SocialRobot· Updated 2026
Social media sizes & dimensions in 2026
Dimensions, aspect ratios, and file limits per network, aligned with what SocialRobot prepares at publish. Crop and compress in the composer; this is the cheat sheet.
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Quick reference
All dimensions at a glance
| Platform | Type | Dimensions | Aspect | Max size |
|---|---|---|---|---|
| Feed / carousel image | 1080×1350 (recommended) | 4:5–1.91:1 | 8 MB | |
| Story image | 1080×1920 | 9:16 | 8 MB | |
| Reel / feed video | 1080×1920 recommended | 9:16 | 100 MB | |
| TikTok | Photo / carousel | 1080×1920 | 9:16 | 20 MB per image |
| TikTok | Video | 1080×1920 recommended | 9:16 recommended | 4 GB |
| Feed image | Long edge up to 2048 | Flexible | 10 MB | |
| Link preview (Open Graph) | 1200×630 | 1.91:1 | 8 MB recommended | |
| Page / profile cover | 820×312 | ~2.63:1 | Keep light (under a few MB) | |
| Story image | 1080×1920 | 9:16 | 10 MB | |
| Reel video | 1080×1920 recommended | 9:16 | 2 GB | |
| Story video | 1080×1920 recommended | 9:16 | 2 GB | |
| X | Post image | Long edge up to 2048 | Flexible | 5 MB |
| X | GIF | Up to 1280×1080 | Flexible | 15 MB |
| X | Video | Up to 1280×1024 | 1:3–3:1 | 512 MB (higher if verified) |
| Post image | Long edge up to 2048 | Flexible | 5 MB | |
| Video | Flexible | Flexible | 200 MB | |
| Document | n/a | n/a | 100 MB | |
| Image Pin | 1000×1500 | 2:3 | 20 MB | |
| Video Pin | Flexible | Flexible | 2 GB | |
| Threads | Post image | 1080×1350 (recommended) | 4:5–1.91:1 | 8 MB |
| Threads | Story image | 1080×1920 | 9:16 | 8 MB |
| Threads | Video | Flexible | Flexible | 1 GB |
| Bluesky | Profile banner (header) | 1500×500 | 3:1 | Keep under 1 MB for fast upload |
| Bluesky | Profile picture | 400×400 recommended | 1:1 | Under 2 MB |
| Bluesky | Post image | Long edge up to 2048 | Flexible | 2 MB |
| Bluesky | Video | Flexible | Flexible | 100 MB |
| Mastodon | Post image | Long edge up to 3840; matrix ≤8.3 MP | Flexible | 16 MB (default) |
| Mastodon | Video | Long edge up to 1920 | Flexible | 40 MB (default) |
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