Social Media Image Sizes (Reference)
Quick answer
Common, widely-documented image sizes for posts, stories and thumbnails. Platforms change these — always confirm against the official help page linked below.
Platforms change these dimensions and crop rules often. The values below are widely-documented common sizes — confirm against each platform's official help page before anything important.
| Use | Dimensions | Aspect ratio |
|---|---|---|
| Square post | 1080 × 1080 | 1:1 |
| Portrait post | 1080 × 1350 | 4:5 |
| Vertical story / reel | 1080 × 1920 | 9:16 |
| Landscape post | 1200 × 630 | 1.91:1 |
| YouTube thumbnail | 1280 × 720 | 16:9 |
YouTube's 1280×720 thumbnail (under 2 MB) is from YouTube's official help page (cited below). The others are common community-standard sizes; treat them as a starting point.
Sources
- Add video thumbnails — Google (YouTube) · verified 2026-06-19
Last verified · reviewed frequently.
Change history
- — Initial publication (YouTube thumbnail verified; others documented with caveats).