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  <xs:element id="sgi_ChangesinAccruedSalesReturnsRollForward" abstract="true" name="ChangesinAccruedSalesReturnsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sgi_SalesReturnsAndAllowancesGood" abstract="false" name="SalesReturnsAndAllowancesGood" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_SalesReturnsChargedToSalesAllowanceAccrual" abstract="false" name="SalesReturnsChargedToSalesAllowanceAccrual" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_SeniorNotesDue2031Member" abstract="true" name="SeniorNotesDue2031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_WholesaleMember" abstract="true" name="WholesaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_RoyaltyIncomeNet" abstract="false" name="RoyaltyIncomeNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_ShippingAndHandlingIncludedInNetSales" abstract="false" name="ShippingAndHandlingIncludedInNetSales" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_MatressFirmMember" abstract="true" name="MatressFirmMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_TermLoanFacilityMember" abstract="true" name="TermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_ProceedsFromSaleOfRealEstateHeldForInvestmentEscrow" abstract="false" name="ProceedsFromSaleOfRealEstateHeldForInvestmentEscrow" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_BusinessCombinationAcquisitionRelatedCostsInterestExpenseNet" abstract="false" name="BusinessCombinationAcquisitionRelatedCostsInterestExpenseNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_NumberOfRetailLocations" abstract="false" name="NumberOfRetailLocations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sgi_NumberOfSpecialtyRetailLocations" abstract="false" name="NumberOfSpecialtyRetailLocations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sgi_NumberOfDistributionCenters" abstract="false" name="NumberOfDistributionCenters" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sgi_DreamsTopcoLimitedMember" abstract="true" name="DreamsTopcoLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_InternationalMember" abstract="true" name="InternationalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_IntangibleAssetsCombinedIndefiniteLivedAndFiniteLivedIntangibleAssetsByMajorClassTable" abstract="true" name="IntangibleAssetsCombinedIndefiniteLivedAndFiniteLivedIntangibleAssetsByMajorClassTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="sgi_CombinedIndefiniteLivedAndFiniteLivedIntangibleAssetsByMajorClassAxis" abstract="true" name="CombinedIndefiniteLivedAndFiniteLivedIntangibleAssetsByMajorClassAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sgi_CombinedIndefiniteLivedAndFiniteLivedIntangibleAssetsByMajorClassDomain" abstract="true" name="CombinedIndefiniteLivedAndFiniteLivedIntangibleAssetsByMajorClassDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_ContractualOrDistributerRelationshipsMember" abstract="true" name="ContractualOrDistributerRelationshipsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_TechnologyAndOtherMember" abstract="true" name="TechnologyAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_PatentsOtherTrademarksMember" abstract="true" name="PatentsOtherTrademarksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_IntangibleAssetsCombinedIndefiniteLivedAndFiniteLivedIntangibleAssetsByMajorClassLineItems" abstract="true" name="IntangibleAssetsCombinedIndefiniteLivedAndFiniteLivedIntangibleAssetsByMajorClassLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="sgi_A2023CreditAgreementMember" abstract="true" name="A2023CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sgi_TermLoanAxis" abstract="true" name="TermLoanAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="sgi_TermLoanDomain" abstract="true" name="TermLoanDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_TermFacilityMember" abstract="true" name="TermFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_TermBFacilityMember" abstract="true" name="TermBFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sgi_OtherBorrowingsMember" abstract="true" name="OtherBorrowingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_LIBORMember" abstract="true" name="LIBORMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sgi_LongTermDebtAndLeaseObligationGross" abstract="false" name="LongTermDebtAndLeaseObligationGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_DebtInstrumentCreditSpreadAdjustmentOnVariableRate" abstract="false" name="DebtInstrumentCreditSpreadAdjustmentOnVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sgi_IncrementalFacilityMember" abstract="true" name="IncrementalFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_AmendmentNo.2Member" abstract="true" name="AmendmentNo.2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sgi_DailySimpleSOFRRateMember" abstract="true" name="DailySimpleSOFRRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sgi_TermSOFRRateMember" abstract="true" name="TermSOFRRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="sgi_LineOfCreditFacilityIncreaseInBorrowingCapacity" abstract="false" name="LineOfCreditFacilityIncreaseInBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_DebtInstrumentCovenantLeverageRatioConsolidatedIndebtednessLettersOfCreditOutstanding" abstract="false" name="DebtInstrumentCovenantLeverageRatioConsolidatedIndebtednessLettersOfCreditOutstanding" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_DomesticAndForeignQualifiedCashMaximumPercentage" abstract="false" name="DomesticAndForeignQualifiedCashMaximumPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sgi_DomesticAndForeignUnrestrictedCash" abstract="false" name="DomesticAndForeignUnrestrictedCash" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_EquityInterestOfSubsidiaryGuarantor" abstract="false" name="EquityInterestOfSubsidiaryGuarantor" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sgi_EquityVotingRightsOfSubsidiary" abstract="false" name="EquityVotingRightsOfSubsidiary" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sgi_LeaseRightofUseAsset" abstract="false" name="LeaseRightofUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_OperatingandFinanceLeaseLiability" abstract="false" name="OperatingandFinanceLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sgi_LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearTwo" abstract="false" name="LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearThree" abstract="false" name="LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearFour" abstract="false" name="LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearFive" abstract="false" name="LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_LesseeOperatingandFinanceLeaseLiabilityPaymentsDueafterYearFive" abstract="false" name="LesseeOperatingandFinanceLeaseLiabilityPaymentsDueafterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_LesseeOperatingandFinanceLeaseLiabilityPaymentsDue" abstract="false" name="LesseeOperatingandFinanceLeaseLiabilityPaymentsDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="sgi_LeasesWeightedAverageRemainingLeaseTermAbstract" abstract="true" name="LeasesWeightedAverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sgi_LeasesWeightedAverageDiscountRateAbstract" abstract="true" name="LeasesWeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sgi_CashFlowLesseeAbstract" abstract="true" name="CashFlowLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sgi_EligibleEmployeeContributionMaximum" abstract="false" name="EligibleEmployeeContributionMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sgi_DefinedContributionPlanEmploymenteligibilitytoreceivematchingcontributionsminimum" abstract="false" name="DefinedContributionPlanEmploymenteligibilitytoreceivematchingcontributionsminimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
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  <xs:element id="sgi_DefinedContributionPlanEligibleEmployeeContributionMatchedByCompanySecondTier" abstract="false" name="DefinedContributionPlanEligibleEmployeeContributionMatchedByCompanySecondTier" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sgi_MultiemployerPlansHealthAndWelfareMember" abstract="true" name="MultiemployerPlansHealthAndWelfareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_UnitedFurnitureWorkersPensionFundAMember" abstract="true" name="UnitedFurnitureWorkersPensionFundAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_PensionPlanOfTheNationalRetirementFundMember" abstract="true" name="PensionPlanOfTheNationalRetirementFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_CentralStatesSoutheastSouthwestAreasPensionPlanMember" abstract="true" name="CentralStatesSoutheastSouthwestAreasPensionPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_MultiemployerPlansCertifiedZoneStatusAxis" abstract="true" name="MultiemployerPlansCertifiedZoneStatusAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
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  <xs:element id="sgi_RedMember" abstract="true" name="RedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_YellowMember" abstract="true" name="YellowMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="sgi_MultiemployerPlanNumberOfDomesticManufacturingFacilities" abstract="false" name="MultiemployerPlanNumberOfDomesticManufacturingFacilities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sgi_MultiemployerPlansSurchargeRate" abstract="false" name="MultiemployerPlansSurchargeRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sgi_MultiemployerPlansFundedStatusPercentage" abstract="false" name="MultiemployerPlansFundedStatusPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="sgi_TimeInWhichMultiemployerPlanIsProjectedToBeCreditBalance" abstract="false" name="TimeInWhichMultiemployerPlanIsProjectedToBeCreditBalance" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sgi_TimeInWhichMultiemployerPlanIsProjectedNotToBeCreditBalance" abstract="false" name="TimeInWhichMultiemployerPlanIsProjectedNotToBeCreditBalance" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
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  <xs:element id="sgi_February2017ProgramMember" abstract="true" name="February2017ProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_PerformanceBasedRestrictedStockUnitsMember" abstract="true" name="PerformanceBasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_CommonStockNumberofVotesGrantedperCommonShareHeld" abstract="false" name="CommonStockNumberofVotesGrantedperCommonShareHeld" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sgi_AccruedSalariesandEmployeeBenefitsCurrent" abstract="false" name="AccruedSalariesandEmployeeBenefitsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_LongTermIncentivePlan2013Member" abstract="true" name="LongTermIncentivePlan2013Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncreaseDecreaseForPerformanceAdjustments" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncreaseDecreaseForPerformanceAdjustments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="sgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanStockOptionsOutstandingIntrinsicValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanStockOptionsOutstandingIntrinsicValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionExpectedTerm" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionExpectedTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="sgi_StockOptionPlans2002And2003Member" abstract="true" name="StockOptionPlans2002And2003Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_UnvestedStockOptionsMember" abstract="true" name="UnvestedStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVested" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVested" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="sgi_UnvestedStockOptionsAdditionalDisclosureRollForward" abstract="true" name="UnvestedStockOptionsAdditionalDisclosureRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="sgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="sgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="sgi_EffectiveIncomeTaxRateReconciliationExpirationOfTaxCreditForeign" abstract="false" name="EffectiveIncomeTaxRateReconciliationExpirationOfTaxCreditForeign" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_EffectiveIncomeTaxRateReconciliationExpirationOfTaxCreditForeignPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationExpirationOfTaxCreditForeignPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="sgi_DeferredTaxAssetsOperatingLeaseObligations" abstract="false" name="DeferredTaxAssetsOperatingLeaseObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_DanishTaxAuthoritySKATMember" abstract="true" name="DanishTaxAuthoritySKATMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_IncomeTaxExaminationAccruedTaxandInterest" abstract="false" name="IncomeTaxExaminationAccruedTaxandInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_IncomeTaxBenefitNet" abstract="false" name="IncomeTaxBenefitNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_IncomeTaxBenefitGross" abstract="false" name="IncomeTaxBenefitGross" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_IncomeTaxExpenseOverpaymentOfInterest" abstract="false" name="IncomeTaxExpenseOverpaymentOfInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="sgi_NumeratorAbstract" abstract="true" name="NumeratorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sgi_DenominatorAbstract" abstract="true" name="DenominatorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sgi_OtherGeographicLocationsMember" abstract="true" name="OtherGeographicLocationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_SalesChannelConcentrationRiskMember" abstract="true" name="SalesChannelConcentrationRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_DirectChannelMember" abstract="true" name="DirectChannelMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="sgi_NumberOfCountriesProductsAreSold" abstract="false" name="NumberOfCountriesProductsAreSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sgi_NumberOfWholesaleCustomersProductsAreSoldTo" abstract="false" name="NumberOfWholesaleCustomersProductsAreSoldTo" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="sgi_SegmentInformationAbstract" abstract="true" name="SegmentInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="sgi_RoyaltyRevenueNetOfRoyaltyExpense" abstract="false" name="RoyaltyRevenueNetOfRoyaltyExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
