Bluesky Post Image Size (2026)
Post images show best at 1200×675 px (16:9). Square 1200×1200 (1:1) also works. Up to 4 images per post.
| Placement | Pixels | Ratio | |
|---|---|---|---|
| Landscape (recommended) — 16:9 Fills the feed card without cropping |
1200×675 | 16:9 | |
| Square — 1:1 Good for single-image posts |
1200×1200 | 1:1 | |
| Portrait — 4:5 Taller frame; may crop in the preview |
1080×1350 | 4:5 |
Use 1200×675 for feed posts
Bluesky previews images in the feed as a wide card. A 1200×675 px (16:9) image fills that card cleanly without an awkward crop. Square 1200×1200 also displays well for single images.
Multiple images
You can attach up to 4 images per post; Bluesky arranges them in a grid, so aim for consistent ratios.
Format and quality
Upload JPG or PNG. Larger source images are downscaled, so start high-resolution for the sharpest result.
FAQ
What is the best Bluesky post image size in 2026?
1200×675 px (16:9) for landscape feed posts; 1200×1200 px (1:1) works well for single square images.
How many images can a Bluesky post have?
Up to 4 images per post, arranged in a grid.
What aspect ratio does Bluesky use for post images?
16:9 landscape previews best; 1:1 square and 4:5 portrait are also supported.