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Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	Aug. 02, 2025	Sep. 19, 2025	Jan. 31, 2025
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Aug. 02, 2025
Current Fiscal Year End Date	--08-02
Document Transition Report	false
Entity File Number	001-38291
Entity Registrant Name	STITCH FIX, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-5026540
Entity Address, Address Line One	1 Montgomery Street
Entity Address, Address Line Two	Suite 1500
Entity Address, City or Town	San Francisco,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94104
City Area Code	415
Local Phone Number	882-7765
Title of 12(b) Security	Class A common stock, par value $0.00002 per share
Trading Symbol	SFIX
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Documents Incorporated by Reference	Portions of the registrant’s definitive Proxy Statement for the 2025 Annual Meeting of Stockholders to be filed with the U.S. Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K are incorporated by reference in Part III, Items 10-14 of this Annual Report on Form 10-K.
Entity Central Index Key	0001576942
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Class A
Document Information [Line Items]
Entity Public Float			$ 508,798,833
Entity Common Stock, Shares Outstanding		118,557,927
Common Class B
Document Information [Line Items]
Entity Public Float			$ 20,513,199
Entity Common Stock, Shares Outstanding		15,553,053