Social Media Image Sizes 2026: The Complete Cheat Sheet

Upload a beautifully designed graphic in the wrong size and the platform will fix it for you — badly. Faces get cropped out of thumbnails, text disappears under interface buttons, and compression re-runs turn sharp graphics into mush. This cheat sheet lists the sizes that actually matter in 2026, plus why hitting them exactly is worth the two minutes it takes.

Instagram

• Square post: 1080×1080 — still the safest, most reliable format for the feed
• Portrait post: 1080×1350 (4:5) — takes up more feed space, usually better engagement
• Landscape post: 1080×566 (1.91:1) — least feed real estate; rarely the best choice
• Stories & Reels: 1080×1920 (9:16) — keep key content in the center 1080×1420 safe zone, away from the UI at top and bottom
• Profile photo: 320×320 (displays as a circle)

YouTube

• Thumbnail: 1280×720 (16:9) — the single most important image on YouTube; minimum width 640
• Channel banner: 2560×1440, but the 'safe area' visible on all devices is just 1546×423 in the center
• Profile picture: 800×800

Thumbnails deserve special attention: they're displayed tiny (often around 168×94 in mobile feeds), so bold text and high contrast at 1280×720 should remain readable when shrunk 8x. A quick sanity check — zoom your thumbnail out to 10% before uploading. If you can't read it, neither can your viewers.

X (Twitter), LinkedIn and Facebook

• X in-feed image: 1600×900 (16:9) displays fully; 1080×1080 also works well
• X header: 1500×500
• LinkedIn post image: 1200×1200 square or 1200×627 for links
• LinkedIn company page cover: 1128×191; personal banner: 1584×396
• Facebook shared image: 1200×630; event cover: 1920×1005

Why exact sizes matter

Three reasons. First, cropping: platforms crop to their aspect ratio automatically, and their algorithm doesn't know your logo is in the top-left corner. Second, quality: when you upload an image larger than the platform's target, it re-compresses it with aggressive settings — often worse than what you'd get compressing it yourself. Third, speed: a correctly sized 200 KB image loads instantly on mobile; a 5 MB original stutters.

There's also the safe-zone issue specific to vertical video formats. Stories, Reels and TikTok overlay usernames at the top and captions/buttons at the bottom. Text placed outside the central safe zone gets covered. Designing at 1080×1920 with content centered vertically avoids the problem entirely.

Resizing without wrecking quality

Downscaling is safe: shrinking a 4000×3000 photo to 1080×1080 keeps it sharp. Upscaling is not: stretching a 400×400 image to 1080×1080 will blur no matter the tool. Always start from the largest source you have, resize down to the exact platform size, and only then compress.

The workflow takes about a minute with our free tools: open the Image Resizer, enter the exact dimensions (say, 1080×1350 for an Instagram portrait), keep the aspect-ratio lock on to avoid distortion, and download. If the result is over ~300 KB, run it through the Image Compressor at quality 80. Everything happens locally in your browser — handy when you're working with unpublished campaign assets.

Save this for later

Bookmark this page — platform specs change, and we keep the numbers current. The core principle doesn't change though: give each platform exactly the pixel dimensions it asks for, in a modern format, compressed sensibly. Do that and your images will look the way you designed them, instead of the way an algorithm guessed they should.