v3.19.3.a.u2
Document and Entity Information Document - shares
3 Months Ended
Nov. 02, 2019
Dec. 04, 2019
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Nov. 02, 2019  
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 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  
Current Fiscal Year End Date --08-01  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Common Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   55,340,765
Common Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   46,385,917