Free publishing reference
Social media image sizes 2026
Practical image dimensions, file caps, and honest caveats for the networks founders and lean teams use most. Updated August 26, 2026.
1200 × 630
Link card default
A reliable Open Graph shape for pages shared across networks.
1080 × 1080
Square feed default
A flexible starting point when a platform gives no precise organic spec.
Under 2MB
Practical file target
Clears the tightest documented per-image cap in this reference.
1200 × 627 for link posts
3MB · PNG or JPEG
No still-image size published; GIFs up to 1280 × 1080
5MB images · 15MB GIFs
320–1440px wide; 1080 × 1080 is a practical default
8MB · JPEG or PNG
Up to 4 images; use 1080 × 1080 as a flexible default
2MB per image
Up to 4 images; files are downscaled to 8.3 megapixels
16MB · server-configurable
1200 × 630 for Open Graph link cards
8MB for link images
Photos are compressed; width + height up to 10,000px
10MB via Bot API
No recommended post size; pasted links use page metadata
10 MiB default
1200 × 1200 or 1200 × 628 from the ads specification
20MB · JPG or PNG
Platform specifications change, and several networks publish upload limits without a recommended organic feed size. Where a platform does not publish a recommendation, this table says so instead of inventing precision.
Keep the export simple
One 1200 × 630 Open Graph image handles most link previews. For feed images, a square export and a 4:5 portrait version cover more practical use cases than a folder of platform-specific crops.
Keep essential words away from the edges, write alt text, and check the final file size before scheduling. A platform can accept an upload while still displaying it poorly in the feed.