Reddit image sizes
Avatar / community icon
1:1256×256
Displayed circular for profiles and communities.
Verified July 20, 2026
Profile / community banner
15:21920×256
Wide crop; keep important content centered.
Verified July 20, 2026
Post image
4:31200×900
4:3 works well; Reddit also accepts taller images.
Verified July 20, 2026
Link thumbnail
1:1140×140
Square thumb next to link posts.
Verified July 20, 2026