<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-12-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001211805</issuerCik>
        <issuerName>My Size, Inc.</issuerName>
        <issuerTradingSymbol>MYSZ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001686315</rptOwnerCik>
            <rptOwnerName>Luzon Ronen</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MY SIZE INC.</rptOwnerStreet1>
            <rptOwnerStreet2>HANEGEV 4, POB 1026</rptOwnerStreet2>
            <rptOwnerCity>AIRPORT CITY</rptOwnerCity>
            <rptOwnerState>L3</rptOwnerState>
            <rptOwnerZipCode>7019900</rptOwnerZipCode>
            <rptOwnerStateDescription>ISRAEL</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-12-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>215000</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>289335</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-12-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>60000</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>79750</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Restricted shares granted under the My Size, Inc. 2017 Equity Incentive Plan (the &quot;Plan&quot;).</footnote>
        <footnote id="F2">75,000 restricted shares vest in three equal annual installments, with 1/3 vesting on each of January 1, 2026, January 1, 2027 and January 1, 2028, subject to the Reporting Person's continued service to the Issuer as of each vesting date.</footnote>
        <footnote id="F3">Up to 125,000 restricted shares vest upon and subject to achievement of certain profit and business targets as set forth in the restricted stock agreement, subject to the Reporting Person's continued service to the Issuer as of each vesting date.</footnote>
        <footnote id="F4">15,000 restricted shares vest on December 31, 2025, subject to the Reporting Person's continued service to the Issuer as of such vesting date.</footnote>
        <footnote id="F5">40,000 restricted shares vest in three equal annual installments, with 1/3 vesting on each of January 1, 2026, January 1, 2027 and January 1, 2028, subject to the Reporting Person's spouse continued service to the Issuer as of each vesting date.</footnote>
        <footnote id="F6">Up to 20,000 restricted shares vest upon and subject to achievement of certain profit and business targets as set forth in the restricted stock agreement, subject to the Reporting Person's spouse continued service to the Issuer as of each vesting date.</footnote>
        <footnote id="F7">Common stock beneficially owned by Reporting Perosn's Spouse (Chief Product Officer and Chief Operating Officer Billy Pardo) under the Plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Ronen Luzon</signatureName>
        <signatureDate>2025-12-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
