Platforms change their image rules from time to time, and each one checks the final upload. This page lists only what each platform states itself. Where a platform does not publish a size, it says so instead of repeating a figure from elsewhere. Sizes are in pixels, width × height.
To resize an image to any of these sizes, use the free image resizer. It works in your browser, so the image never leaves your device.
Jump to: YouTube · Bluesky · Dribbble · Twitch · Tumblr · Medium · DEV.to · Instagram · Facebook · LinkedIn · X · Threads · Pinterest · TikTok · Mastodon · Google Business · Reddit · Discord
YouTube image sizes
You can connect YouTube to PostDelegate today: see the YouTube scheduler.
| Image | Size | Notes |
|---|---|---|
| Video thumbnail | 16:9, recommended 3840×2160 | At least 640 wide. JPG or PNG. Up to 2 MB when uploaded on mobile, 50 MB on a computer. |
| Shorts thumbnail | 9:16, recommended 2160×3840 | At least 640 tall. |
| Channel banner | 2560×1440 recommended | At least 2048×1152 at 16:9. Keep text and logos inside the 1235×338 safe area at the minimum size. Up to 6 MB. |
| Profile picture | Shown at 98×98 | JPG, GIF, BMP or PNG, without animation. Up to 15 MB. |
Sources, checked November 2026: YouTube Help: thumbnails, YouTube Help: banner and profile picture
Bluesky image sizes
You can connect Bluesky to PostDelegate today: see the Bluesky scheduler.
| Image | Size | Notes |
|---|---|---|
| Post images | No size published | Up to four images per post. |
Bluesky does not publish recommended pixel sizes. PostDelegate scales an image down before posting it to Bluesky if the file is larger than about 1 MB.
Source, checked November 2026: Bluesky developer docs: posts
Dribbble image sizes
You can connect Dribbble to PostDelegate today: see the Dribbble scheduler.
| Image | Size | Notes |
|---|---|---|
| Shot (through PostDelegate) | 800×600 or 400×300 | Images of at least 400×300 are cropped from the centre to 800×600 or 400×300. GIFs must already be exactly one of those sizes. |
| Avatar | No size published | JPG, GIF or PNG, up to 800 KB. |
| Pro masthead banner | At least 1600×1200 | JPG or PNG, up to 5 MB. |
Source, checked November 2026: Dribbble Help: your profile
Twitch image sizes
You can connect Twitch to PostDelegate today: see the Twitch scheduler.
| Image | Size | Notes |
|---|---|---|
| Profile picture | 256×256 | GIF, JPG or PNG, up to 10 MB. |
| Profile banner | 1200×480 | Up to 10 MB. |
| Panel image | Up to 320×300 | Under 2.9 MB. |
Sources, checked November 2026: Twitch Help: account settings, Twitch Help: channel page setup
Tumblr image sizes
You can connect Tumblr to PostDelegate today: see the Tumblr scheduler.
| Image | Size | Notes |
|---|---|---|
| Avatar | 128×128 | Up to 10 MB. |
| Header | 2048×1152 (16:9) | Up to 10 MB. |
| Post image | 540×810 recommended | Up to 20 MB. Up to 10 images per post in the apps, 30 on the web. |
Source, checked November 2026: Tumblr Help: images and GIFs
Medium image sizes
You can connect Medium to PostDelegate today: see the Medium scheduler.
| Image | Size | Notes |
|---|---|---|
| Story image | At least 1192 wide | Needed for every placement option. JPG, GIF or PNG, up to 25 MB. |
Source, checked November 2026: Medium Help: using images
DEV.to image sizes
You can connect DEV.to to PostDelegate today: see the DEV.to scheduler.
| Image | Size | Notes |
|---|---|---|
| Cover image | 1000×420 | The size DEV calls best in its editor guide. |
Source, checked November 2026: DEV editor guide
Instagram image sizes
Instagram is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Feed photo | 1080 wide, 1080×566 to 1080×1440 | Aspect ratio between 1.91:1 and 3:4. Photos narrower than 320 are enlarged; wider than 1080 are reduced. |
| Reel cover | 420×654 (1:1.55) | — |
Sources, checked November 2026: Instagram Help: photo resolution, Instagram Help: reels
Facebook image sizes
Facebook is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Page cover photo | Loads fastest at 851×315 | At least 400×150. An sRGB JPG under 100 KB loads fastest; PNG suits logos and text. |
| Page profile picture | 320×320 | Shown at 176×176 on computers and 196×196 on phones. |
| Link share image (Open Graph) | At least 1200×630 | Aim for 1.91:1. At least 600×315 for a large link preview, 200×200 at the smallest. Up to 8 MB. |
Sources, checked November 2026: Facebook Help: Page cover and profile picture, Meta for Developers: sharing images
LinkedIn image sizes
LinkedIn is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Page logo | 400×400 recommended | At least 268×268. PNG or JPEG, up to 3 MB. |
| Page cover image | 1512×256 | PNG or JPEG, up to 3 MB. |
| Profile photo | 400×400 to 7680×4320 | PNG or JPG, up to 8 MB. |
| Profile background | 1584×396 recommended | JPG or PNG, under 8 MB. |
| Link preview image | 1200×627 (1.91:1) | Wider than 200. |
Sources, checked November 2026: LinkedIn Help: Page images, LinkedIn Help: profile photo, LinkedIn Help: background photo, LinkedIn Help: link previews
X image sizes
X is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Profile photo | 400×400 | JPEG, GIF or PNG, up to 2 MB. |
| Header | 1500×500 | Up to 60 pixels may be cropped at the top and bottom. |
| Post photo | No size published | GIF, JPEG or PNG, up to 5 MB. Animated GIFs up to 5 MB on mobile and 15 MB on the web. |
Sources, checked November 2026: X Help: profile photo and header, X Help: posting GIFs and pictures
Threads image sizes
Threads is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Post image (API) | 320 to 1440 wide | JPEG or PNG, up to 8 MB, aspect ratio up to 10:1, sRGB. Wider images are scaled down to 1440. |
Source, checked November 2026: Meta for Developers: Threads posts
Pinterest image sizes
Pinterest is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Standard pin | 2:3, 1000×1500 | PNG or JPEG, up to 20 MB on a computer and 32 MB in the app. Taller pins may be cut off in feeds. |
Source, checked November 2026: Pinterest Business Help: product specs
TikTok image sizes
TikTok is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Photo post (API) | Up to 1080p | JPEG or WebP, up to 20 MB per image. |
Source, checked November 2026: TikTok for Developers: media transfer guide
Mastodon image sizes
Mastodon is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Avatar | 400×400 | Larger images are reduced to this size. WEBP, PNG, GIF or JPG, up to 2 MB. |
| Header | 1500×500 | Larger images are reduced to this size. WEBP, PNG, GIF or JPG, up to 2 MB. |
| Post image | Reduced to 8.3 megapixels | Up to 16 MB and four images per post. Your server’s limits may differ. |
Sources, checked November 2026: Mastodon docs: profile, Mastodon docs: posting
Google Business image sizes
Google Business is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Photo | 720×720 recommended | At least 250×250. JPG or PNG, between 10 KB and 5 MB. |
Source, checked November 2026: Google Business Profile Help: photos
Reddit image sizes
Reddit is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Community banner | At least 1072×128 | At least 1080×128 on mobile. |
| Community icon | 300×300 | — |
Sources, checked November 2026: Reddit Help: banner, Reddit Help: community icon
Discord image sizes
Discord is coming soon on PostDelegate.
| Image | Size | Notes |
|---|---|---|
| Server banner | At least 960×540 (16:9) | A 1920×1080 image is resized automatically. |
| Server invite background | 1920×1080 | JPG or PNG. |
Sources, checked November 2026: Discord Support: server banner, Discord Support: invite background
Questions
What size should a YouTube thumbnail be?
What is the best image size for link previews?
Why are some sizes missing?
How do I resize an image to one of these sizes?
Related
- Image resizer for every size on this page
- YouTube scheduler and the guide to scheduling YouTube videos
- Bluesky scheduler and the guide to scheduling Bluesky posts
- Social media character limits in 2026
Ready to plan the posts these images go with? Start your 7-day free trial. No card is needed.
Platform names belong to their owners. PostDelegate is not affiliated with or endorsed by any of the platforms listed.