Bluesky image & video sizes
Bluesky is flexible with image dimensions and supports up to four images per post. A square or landscape image at around 1200 px on the long edge is a safe default.
TypeDimensionsRatio
Image1,200 × 1,200 px1:1
Profile photo400 × 400 px1:1
Banner3,000 × 1,000 px3:1
Recommended sizes as of 2026. Networks adjust specs and some accept a range — verify the current size before publishing.
FAQ
Bluesky sizes, answered
What image size works on Bluesky?
Bluesky is flexible; a square (1200 × 1200 px) or landscape image around 1200 px on the long edge is a safe choice. You can attach up to four images per post.
What is the Bluesky banner size?
A wide banner around 3000 × 1000 px (3:1) works well; verify the current spec as the platform evolves.
Size it, then schedule it
Compose, preview natively at the right size, and schedule Bluesky posts — free.