<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e9849-5aee-7afe-8c18-110335543764,g:6bdca16d-f43e-4b82-b37d-62f0baa6ed01-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_ck0001540305_GeopoliticalRiskMember_label_en-US" xlink:label="lab_ck0001540305_GeopoliticalRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geopolitical Risk Member</link:label>
    <link:label id="lab_ck0001540305_GeopoliticalRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_GeopoliticalRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Geopolitical Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_GeopoliticalRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_GeopoliticalRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_GeopoliticalRiskMember" xlink:to="lab_ck0001540305_GeopoliticalRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ETFRisksCashRedemptionRiskMember_label_en-US" xlink:label="lab_ck0001540305_ETFRisksCashRedemptionRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ETF Risks, Cash Redemption Risk Member</link:label>
    <link:label id="lab_ck0001540305_ETFRisksCashRedemptionRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ETFRisksCashRedemptionRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ETF Risks, Cash Redemption Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ETFRisksCashRedemptionRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ETFRisksCashRedemptionRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ETFRisksCashRedemptionRiskMember" xlink:to="lab_ck0001540305_ETFRisksCashRedemptionRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_IssuerSpecificRiskMember_label_en-US" xlink:label="lab_ck0001540305_IssuerSpecificRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Issuer-Specific Risk Member</link:label>
    <link:label id="lab_ck0001540305_IssuerSpecificRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_IssuerSpecificRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Issuer-Specific Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_IssuerSpecificRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_IssuerSpecificRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_IssuerSpecificRiskMember" xlink:to="lab_ck0001540305_IssuerSpecificRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_MarketCapitalizationRiskMember_label_en-US" xlink:label="lab_ck0001540305_MarketCapitalizationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Market Capitalization Risk Member</link:label>
    <link:label id="lab_ck0001540305_MarketCapitalizationRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_MarketCapitalizationRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Market Capitalization Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_MarketCapitalizationRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_MarketCapitalizationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_MarketCapitalizationRiskMember" xlink:to="lab_ck0001540305_MarketCapitalizationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ConcentrationRiskMachineryIndustryRiskMember_label_en-US" xlink:label="lab_ck0001540305_ConcentrationRiskMachineryIndustryRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Machinery Industry Risk Member</link:label>
    <link:label id="lab_ck0001540305_ConcentrationRiskMachineryIndustryRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ConcentrationRiskMachineryIndustryRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Concentration Risk, Machinery Industry Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ConcentrationRiskMachineryIndustryRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ConcentrationRiskMachineryIndustryRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ConcentrationRiskMachineryIndustryRiskMember" xlink:to="lab_ck0001540305_ConcentrationRiskMachineryIndustryRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_EmergingMarketsRiskMember_label_en-US" xlink:label="lab_ck0001540305_EmergingMarketsRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Emerging Markets Risk Member</link:label>
    <link:label id="lab_ck0001540305_EmergingMarketsRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_EmergingMarketsRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Emerging Markets Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_EmergingMarketsRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_EmergingMarketsRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_EmergingMarketsRiskMember" xlink:to="lab_ck0001540305_EmergingMarketsRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_PassiveInvestmentRiskMember_label_en-US" xlink:label="lab_ck0001540305_PassiveInvestmentRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Passive Investment Risk Member</link:label>
    <link:label id="lab_ck0001540305_PassiveInvestmentRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_PassiveInvestmentRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Passive Investment Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_PassiveInvestmentRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_PassiveInvestmentRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_PassiveInvestmentRiskMember" xlink:to="lab_ck0001540305_PassiveInvestmentRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingRiskMember_label_en-US" xlink:label="lab_ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Market Capitalization Risk, Small-Capitalization Investing Risk Member</link:label>
    <link:label id="lab_ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Market Capitalization Risk, Small-Capitalization Investing Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingRiskMember" xlink:to="lab_ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ETFRisksTradingRiskMember_label_en-US" xlink:label="lab_ck0001540305_ETFRisksTradingRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ETF Risks, Trading Risk Member</link:label>
    <link:label id="lab_ck0001540305_ETFRisksTradingRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ETFRisksTradingRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ETF Risks, Trading Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ETFRisksTradingRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ETFRisksTradingRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ETFRisksTradingRiskMember" xlink:to="lab_ck0001540305_ETFRisksTradingRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_C000279845Member_label_en-US" xlink:label="lab_ck0001540305_C000279845Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defiance Robotics Actuators ETF Class</link:label>
    <link:label id="lab_ck0001540305_C000279845Member_documentation_en-US" xlink:label="lab_ck0001540305_C000279845Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">S000108815 Defiance Robotics Actuators ETF C000279845 Defiance Robotics Actuators ETF</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_C000279845Member" xlink:href="ck0001540305-20260911.xsd#ck0001540305_C000279845Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_C000279845Member" xlink:to="lab_ck0001540305_C000279845Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ETFRisksMember_label_en-US" xlink:label="lab_ck0001540305_ETFRisksMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ETF Risks Member</link:label>
    <link:label id="lab_ck0001540305_ETFRisksMember_documentation_en-US" xlink:label="lab_ck0001540305_ETFRisksMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ETF Risks Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ETFRisksMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ETFRisksMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ETFRisksMember" xlink:to="lab_ck0001540305_ETFRisksMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ForeignSecuritiesRiskMember_label_en-US" xlink:label="lab_ck0001540305_ForeignSecuritiesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Securities Risk Member</link:label>
    <link:label id="lab_ck0001540305_ForeignSecuritiesRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ForeignSecuritiesRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Securities Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ForeignSecuritiesRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ForeignSecuritiesRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ForeignSecuritiesRiskMember" xlink:to="lab_ck0001540305_ForeignSecuritiesRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_GeographicInvestmentRiskInvestmentsInJapanMember_label_en-US" xlink:label="lab_ck0001540305_GeographicInvestmentRiskInvestmentsInJapanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographic Investment Risk, Investments In Japan Member</link:label>
    <link:label id="lab_ck0001540305_GeographicInvestmentRiskInvestmentsInJapanMember_documentation_en-US" xlink:label="lab_ck0001540305_GeographicInvestmentRiskInvestmentsInJapanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Geographic Investment Risk, Investments In Japan Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_GeographicInvestmentRiskInvestmentsInJapanMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_GeographicInvestmentRiskInvestmentsInJapanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_GeographicInvestmentRiskInvestmentsInJapanMember" xlink:to="lab_ck0001540305_GeographicInvestmentRiskInvestmentsInJapanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_IndexMethodologyRiskMember_label_en-US" xlink:label="lab_ck0001540305_IndexMethodologyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Index Methodology Risk Member</link:label>
    <link:label id="lab_ck0001540305_IndexMethodologyRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_IndexMethodologyRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Index Methodology Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_IndexMethodologyRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_IndexMethodologyRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_IndexMethodologyRiskMember" xlink:to="lab_ck0001540305_IndexMethodologyRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_S000108815Member_label_en-US" xlink:label="lab_ck0001540305_S000108815Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defiance Robotics Actuators ETF</link:label>
    <link:label id="lab_ck0001540305_S000108815Member_documentation_en-US" xlink:label="lab_ck0001540305_S000108815Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">S000108815 Defiance Robotics Actuators ETF C000279845 Defiance Robotics Actuators ETF</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_S000108815Member" xlink:href="ck0001540305-20260911.xsd#ck0001540305_S000108815Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_S000108815Member" xlink:to="lab_ck0001540305_S000108815Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_GeographicInvestmentRiskChinaAndHongKongSpecificRiskMember_label_en-US" xlink:label="lab_ck0001540305_GeographicInvestmentRiskChinaAndHongKongSpecificRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographic Investment Risk, China And Hong Kong-Specific Risk Member</link:label>
    <link:label id="lab_ck0001540305_GeographicInvestmentRiskChinaAndHongKongSpecificRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_GeographicInvestmentRiskChinaAndHongKongSpecificRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Geographic Investment Risk, China And Hong Kong-Specific Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_GeographicInvestmentRiskChinaAndHongKongSpecificRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_GeographicInvestmentRiskChinaAndHongKongSpecificRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_GeographicInvestmentRiskChinaAndHongKongSpecificRiskMember" xlink:to="lab_ck0001540305_GeographicInvestmentRiskChinaAndHongKongSpecificRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember_label_en-US" xlink:label="lab_ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ETF Risks, Costs Of Buying Or Selling Shares Risk Member</link:label>
    <link:label id="lab_ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ETF Risks, Costs Of Buying Or Selling Shares Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember" xlink:to="lab_ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_IndexProviderRiskMember_label_en-US" xlink:label="lab_ck0001540305_IndexProviderRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Index Provider Risk Member</link:label>
    <link:label id="lab_ck0001540305_IndexProviderRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_IndexProviderRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Index Provider Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_IndexProviderRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_IndexProviderRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_IndexProviderRiskMember" xlink:to="lab_ck0001540305_IndexProviderRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember_label_en-US" xlink:label="lab_ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Market Capitalization Risk, Large-Capitalization Investing Risk Member</link:label>
    <link:label id="lab_ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Market Capitalization Risk, Large-Capitalization Investing Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember" xlink:to="lab_ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_TrackingErrorRiskMember_label_en-US" xlink:label="lab_ck0001540305_TrackingErrorRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tracking Error Risk Member</link:label>
    <link:label id="lab_ck0001540305_TrackingErrorRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_TrackingErrorRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tracking Error Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_TrackingErrorRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_TrackingErrorRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_TrackingErrorRiskMember" xlink:to="lab_ck0001540305_TrackingErrorRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_IPORiskMember_label_en-US" xlink:label="lab_ck0001540305_IPORiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IPO Risk Member</link:label>
    <link:label id="lab_ck0001540305_IPORiskMember_documentation_en-US" xlink:label="lab_ck0001540305_IPORiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IPO Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_IPORiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_IPORiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_IPORiskMember" xlink:to="lab_ck0001540305_IPORiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_CurrencyExchangeRateRiskMember_label_en-US" xlink:label="lab_ck0001540305_CurrencyExchangeRateRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Currency Exchange Rate Risk Member</link:label>
    <link:label id="lab_ck0001540305_CurrencyExchangeRateRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_CurrencyExchangeRateRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Currency Exchange Rate Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_CurrencyExchangeRateRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_CurrencyExchangeRateRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_CurrencyExchangeRateRiskMember" xlink:to="lab_ck0001540305_CurrencyExchangeRateRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_EmergingMarketsRiskCapitalControlsAndSanctionsRiskMember_label_en-US" xlink:label="lab_ck0001540305_EmergingMarketsRiskCapitalControlsAndSanctionsRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Emerging Markets Risk, Capital Controls And Sanctions Risk Member</link:label>
    <link:label id="lab_ck0001540305_EmergingMarketsRiskCapitalControlsAndSanctionsRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_EmergingMarketsRiskCapitalControlsAndSanctionsRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Emerging Markets Risk, Capital Controls And Sanctions Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_EmergingMarketsRiskCapitalControlsAndSanctionsRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_EmergingMarketsRiskCapitalControlsAndSanctionsRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_EmergingMarketsRiskCapitalControlsAndSanctionsRiskMember" xlink:to="lab_ck0001540305_EmergingMarketsRiskCapitalControlsAndSanctionsRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ConcentrationRiskMember_label_en-US" xlink:label="lab_ck0001540305_ConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Member</link:label>
    <link:label id="lab_ck0001540305_ConcentrationRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Concentration Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ConcentrationRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ConcentrationRiskMember" xlink:to="lab_ck0001540305_ConcentrationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_SectorRiskMember_label_en-US" xlink:label="lab_ck0001540305_SectorRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sector Risk Member</link:label>
    <link:label id="lab_ck0001540305_SectorRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_SectorRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sector Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_SectorRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_SectorRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_SectorRiskMember" xlink:to="lab_ck0001540305_SectorRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingRiskMember_label_en-US" xlink:label="lab_ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Market Capitalization Risk, Mid-Capitalization Investing Risk Member</link:label>
    <link:label id="lab_ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Market Capitalization Risk, Mid-Capitalization Investing Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingRiskMember" xlink:to="lab_ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember_label_en-US" xlink:label="lab_ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member</link:label>
    <link:label id="lab_ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember" xlink:to="lab_ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember_label_en-US" xlink:label="lab_ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member</link:label>
    <link:label id="lab_ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember" xlink:to="lab_ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_RoboticsActuatorCompaniesRiskMember_label_en-US" xlink:label="lab_ck0001540305_RoboticsActuatorCompaniesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Robotics Actuator Companies Risk Member</link:label>
    <link:label id="lab_ck0001540305_RoboticsActuatorCompaniesRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_RoboticsActuatorCompaniesRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Robotics Actuator Companies Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_RoboticsActuatorCompaniesRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_RoboticsActuatorCompaniesRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_RoboticsActuatorCompaniesRiskMember" xlink:to="lab_ck0001540305_RoboticsActuatorCompaniesRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_GeographicInvestmentRiskMember_label_en-US" xlink:label="lab_ck0001540305_GeographicInvestmentRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographic Investment Risk Member</link:label>
    <link:label id="lab_ck0001540305_GeographicInvestmentRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_GeographicInvestmentRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Geographic Investment Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_GeographicInvestmentRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_GeographicInvestmentRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_GeographicInvestmentRiskMember" xlink:to="lab_ck0001540305_GeographicInvestmentRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_NewFundRiskMember_label_en-US" xlink:label="lab_ck0001540305_NewFundRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Fund Risk Member</link:label>
    <link:label id="lab_ck0001540305_NewFundRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_NewFundRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">New Fund Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_NewFundRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_NewFundRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_NewFundRiskMember" xlink:to="lab_ck0001540305_NewFundRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_ChinaASharesRiskMember_label_en-US" xlink:label="lab_ck0001540305_ChinaASharesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">China A-Shares Risk Member</link:label>
    <link:label id="lab_ck0001540305_ChinaASharesRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_ChinaASharesRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">China A-Shares Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_ChinaASharesRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_ChinaASharesRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_ChinaASharesRiskMember" xlink:to="lab_ck0001540305_ChinaASharesRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_SPACDerivedCompaniesRiskMember_label_en-US" xlink:label="lab_ck0001540305_SPACDerivedCompaniesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SPAC-Derived Companies Risk Member</link:label>
    <link:label id="lab_ck0001540305_SPACDerivedCompaniesRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_SPACDerivedCompaniesRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SPAC-Derived Companies Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_SPACDerivedCompaniesRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_SPACDerivedCompaniesRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_SPACDerivedCompaniesRiskMember" xlink:to="lab_ck0001540305_SPACDerivedCompaniesRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_DepositaryReceiptRiskMember_label_en-US" xlink:label="lab_ck0001540305_DepositaryReceiptRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depositary Receipt Risk Member</link:label>
    <link:label id="lab_ck0001540305_DepositaryReceiptRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_DepositaryReceiptRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Depositary Receipt Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_DepositaryReceiptRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_DepositaryReceiptRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_DepositaryReceiptRiskMember" xlink:to="lab_ck0001540305_DepositaryReceiptRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_SectorRiskIndustrialsSectorRiskMember_label_en-US" xlink:label="lab_ck0001540305_SectorRiskIndustrialsSectorRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sector Risk, Industrials Sector Risk Member</link:label>
    <link:label id="lab_ck0001540305_SectorRiskIndustrialsSectorRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_SectorRiskIndustrialsSectorRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sector Risk, Industrials Sector Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_SectorRiskIndustrialsSectorRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_SectorRiskIndustrialsSectorRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_SectorRiskIndustrialsSectorRiskMember" xlink:to="lab_ck0001540305_SectorRiskIndustrialsSectorRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001540305_EquityMarketRiskMember_label_en-US" xlink:label="lab_ck0001540305_EquityMarketRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Market Risk Member</link:label>
    <link:label id="lab_ck0001540305_EquityMarketRiskMember_documentation_en-US" xlink:label="lab_ck0001540305_EquityMarketRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity Market Risk Member</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001540305_EquityMarketRiskMember" xlink:href="ck0001540305-20260911.xsd#ck0001540305_EquityMarketRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001540305_EquityMarketRiskMember" xlink:to="lab_ck0001540305_EquityMarketRiskMember" xlink:type="arc" order="1"/>
  </link:labelLink>
</link:linkbase>
