Every image size across eight networks, each one labelled with whether the platform actually published it.
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Each size below is tagged with how it is known. Published means the platform states it in its own documentation. Official, unverified means an official page says so but could not be read directly. Unpublished means it is a convention that works and that nobody official has ever confirmed — which is true of far more of these than the usual list admits.
Checked 2026-08-31.
| Asset | Pixels | Ratio | Source |
|---|---|---|---|
| Page logo | 400 × 400 | 1:1 | Published |
| Page cover The 1128 × 191 everybody still quotes is stale. This is the current published size. | 1512 × 256 | 5.9:1 | Published |
| Post image Minimum width 200 px. LinkedIn publishes this for post images; it says nothing about link previews, which are a separate thing sized by whatever page you linked to. | 1200 × 627 | 1.91:1 | Published |
| Company photo | 900 × 600 | 3:2 | Published |
| Square post Not published by LinkedIn. Works, and is what most teams use. | 1200 × 1200 | 1:1 | Unpublished |
3 MB, PNG or JPEG throughout. LinkedIn recommends JPEG, and sets a minimum width of 200 px for post images.
| Asset | Pixels | Ratio | Source |
|---|---|---|---|
| Profile picture | 400 × 400 | 1:1 | Official, unverified |
| Header | 1500 × 500 | 3:1 | Official, unverified |
| Post image X publishes no per-shape size — only that a single photo renders in full between 2:1 and 3:4. | 1600 × 900 | 16:9 | Unpublished |
| Link preview card | 1200 × 628 | 1.91:1 | Unpublished |
Photos up to 5 MB — JPG, PNG, GIF or WEBP. Four per post. GIFs up to 15 MB.
| Asset | Pixels | Ratio | Source |
|---|---|---|---|
| Square post | 1080 × 1080 | 1:1 | Official, unverified |
| Portrait post The tallest ratio Instagram accepts. | 1080 × 1350 | 4:5 | Official, unverified |
| Landscape post The widest ratio Instagram accepts. | 1080 × 566 | 1.91:1 | Official, unverified |
| Story / Reel | 1080 × 1920 | 9:16 | Official, unverified |
| Profile picture | 320 × 320 | 1:1 | Unpublished |
JPEG, up to 8 MB. The API enforces a ratio between 4:5 and 1.91:1, a minimum width of 320 px and a maximum of 1440 px — anything wider is scaled down.
| Asset | Pixels | Ratio | Source |
|---|---|---|---|
| Video thumbnail The old 1280 × 720 is stale. Minimum width 640. | 3840 × 2160 | 16:9 | Published |
| Shorts thumbnail | 2160 × 3840 | 9:16 | Published |
| Channel banner Safe area 1235 × 338 — everything outside it is cropped on some screens. | 2560 × 1440 | 16:9 | Published |
| Channel icon Renders at 98 × 98; upload larger. | 800 × 800 | 1:1 | Official, unverified |
Thumbnails up to 50 MB on desktop, JPG or PNG. Banners up to 6 MB. Channel icons up to 15 MB, and no animated GIFs.
| Asset | Pixels | Ratio | Source |
|---|---|---|---|
| Post image | 1080 × 1350 | 4:5 | Official, unverified |
| Square post | 1080 × 1080 | 1:1 | Official, unverified |
| Profile picture Inherited from Instagram; Threads publishes nothing of its own. | 320 × 320 | 1:1 | Unpublished |
JPEG or PNG, up to 8 MB, minimum width 320 px and maximum 1440 px. Carousels take 2 to 20 items.
| Asset | Pixels | Ratio | Source |
|---|---|---|---|
| Video / vertical | 1080 × 1920 | 9:16 | Official, unverified |
| Photo post Up to 1080p, up to 35 photos. | 1080 × 1920 | 9:16 | Published |
| Profile picture TikTok publishes no figure for this. | 200 × 200 | 1:1 | Unpublished |
Photos as WebP or JPEG, up to 20 MB each. Video frames must be between 360 px and 4096 px on each side.
| Asset | Pixels | Ratio | Source |
|---|---|---|---|
| Page profile picture Displays at 170 × 170 on desktop and 128 × 128 on mobile, cropped to a circle. Upload at least this size. | 320 × 320 | 1:1 | Published |
| Page cover Minimum 400 × 150. Meta recommends sRGB JPEG under 100 KB. | 851 × 315 | 2.7:1 | Published |
| Link preview | 1200 × 630 | 1.91:1 | Unpublished |
| Square post | 1080 × 1080 | 1:1 | Unpublished |
| Story | 1080 × 1920 | 9:16 | Unpublished |
Meta publishes no size or format ceiling for Page feed images. JPEG and PNG both work.
| Asset | Pixels | Ratio | Source |
|---|---|---|---|
| Post image Bluesky publishes no shape at all — anything up to 4000 px and 2 MB is accepted. Four per post. | 2000 × 2000 | any | Published |
| Link card | 1200 × 630 | 1.91:1 | Official, unverified |
| Avatar Only the 1 MB PNG/JPEG limit is published; the pixel size is community convention. | 1000 × 1000 | 1:1 | Unpublished |
| Banner As with the avatar, a convention rather than a spec. | 1500 × 500 | 3:1 | Unpublished |
Post images up to 2 MB in any image format. Avatars and banners up to 1 MB, PNG or JPEG only.
Every dimension is tagged with how it is known, because a good share of the sizes on every list like this were never published by the platform — they are conventions that happen to work, copied between articles until they read like specifications.
Two of the most widely copied are also years out of date. LinkedIn's page cover is 1512 × 256, not the 1128 × 191 still in circulation, and a YouTube thumbnail is 3840 × 2160 with a 50 MB ceiling, not 1280 × 720 at 2 MB.
Where a platform genuinely publishes nothing — Bluesky's avatar dimensions, most of Facebook's feed sizes — that is what the table says, rather than a confident number with no source behind it.
Because they are. Bluesky publishes byte and format limits for avatars but no pixel size at all; Meta publishes almost nothing for feed images. The sizes in those rows work and are what everybody uses — they are just not specifications, and a list that presented them as such would be passing on somebody else’s guess as fact.
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