Cover Page - shares
 9 Months Ended
Apr. 29, 2023
Jun. 02, 2023
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Apr. 29, 2023  
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 1100  
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 Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0001576942  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Current Fiscal Year End Date --07-29  
Common Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   88,362,258
Common Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   25,405,020