3D grid of different image format sizes representing social media platform dimensions
AI Image Generation7 min readMarch 8, 2026

The Right Image Sizes for Every Social Media Platform in 2026

Why Image Dimensions Matter for Social Media

Social media platforms are not forgiving with incorrectly sized images. Upload an image at the wrong aspect ratio and the platform will crop it — often in ways that cut off important elements of the composition. Upload at too low a resolution and the platform's compression will produce a blurry, pixelated result. Upload at too high a resolution and you may hit file size limits or create unnecessarily slow page loads.

The right dimensions also affect how much visual real estate your image occupies in the feed. A properly sized image takes up the full feed width on both mobile and desktop, maximising visual impact. A poorly sized image may be letterboxed with white bars or reduced to a smaller thumbnail, dramatically reducing its ability to stop the scroll.

LinkedIn Image Sizes in 2026

LinkedIn supports several image formats depending on the post type. Understanding which format to use for which context determines how much of the feed your image occupies.

  • Single image post: 1200 x 627px (1.91:1 ratio) — the standard feed image. Also works at 1200 x 1200px (square) for mobile-first content.
  • Document/carousel: 1080 x 1080px per slide (square) or 1920 x 1080px (16:9 landscape). Square slides are more commonly used and display consistently across devices.
  • Cover photo: 1584 x 396px — the banner at the top of your profile.
  • Profile photo: 400 x 400px minimum, displayed as a circle.
  • Article header: 1200 x 644px recommended.

For AI-generated images intended for LinkedIn posts, generating at 1920 x 1080px (16:9) gives you the highest quality input. LinkedIn will display this at reduced size without cropping, and the full canvas gives you room to compose the image correctly without worrying about cropping at the edges.

Twitter/X Image Sizes in 2026

Twitter/X displays images in the feed at a 16:9 crop by default, with a 2:1 display ratio on some interface versions. Generating images specifically for Twitter/X at 1600 x 900px ensures the image displays correctly without any unwanted cropping.

  • Single tweet image: 1600 x 900px (16:9) recommended, max 5MB
  • Multi-image tweet (2 images): Each image displays at roughly 2:1 — 1200 x 600px per image
  • Multi-image tweet (4 images): Square thumbnails — use 1200 x 1200px per image
  • Profile header: 1500 x 500px (3:1 ratio)
  • Profile photo: 400 x 400px, displayed as a circle

Instagram Image Sizes in 2026

Instagram supports multiple formats, and the display dimensions differ significantly between feed posts, Reels, and Stories. The platform is optimised for vertical content on mobile, which means portrait-orientation content typically performs better for reach.

  • Feed post (square): 1080 x 1080px (1:1) — the safest format for feed posts
  • Feed post (portrait): 1080 x 1350px (4:5) — takes up more vertical space in the feed, generally higher reach
  • Feed post (landscape): 1080 x 566px (1.91:1) — smallest vertical footprint in feed, lower engagement
  • Reels: 1080 x 1920px (9:16) — full vertical video/image format
  • Stories: 1080 x 1920px (9:16) — keep key content in the centre 1080 x 1420px to avoid UI overlap
  • Carousel: 1080 x 1080px square recommended for consistency across slides

Facebook Image Sizes in 2026

Facebook is used across a wide variety of contexts — personal profiles, business pages, groups, and ads — and the optimal image size varies by use case. For business page posts, the landscape format is most common and best supported.

  • Feed post: 1200 x 630px (1.91:1) — standard feed image
  • Square post: 1200 x 1200px — works well on mobile
  • Story: 1080 x 1920px (9:16)
  • Cover photo (page): 851 x 315px — displayed at 820 x 312px on desktop
  • Link preview image: 1200 x 630px

See also: How to Repurpose One Post Across 5 Social Media Platforms for how to build a system that handles these dimension differences efficiently.

TikTok and YouTube Image Sizes in 2026

TikTok is primarily a video platform, but static images are supported in carousel posts (a newer format gaining traction). YouTube uses images primarily for thumbnails and channel art.

  • TikTok carousel image: 1080 x 1920px (9:16) — full vertical format
  • TikTok profile photo: 200 x 200px
  • YouTube thumbnail: 1280 x 720px (16:9) — the most important YouTube image asset for click-through rate
  • YouTube channel art: 2560 x 1440px — safe area 1546 x 423px centred
  • YouTube profile photo: 800 x 800px

A Simple Workflow for Multi-Platform Publishing

Rather than creating separate images at different sizes for every platform, the most efficient approach is to generate your images at the largest required dimension and crop them as needed for each platform. Generate at 1920 x 1080px for landscape content, and at 1080 x 1920px for vertical content. Most platforms will accept these dimensions without issue, and where cropping is needed, you can do it quickly with any basic image editor. See How to Use AI to Create Professional Social Media Images in Minutes for the full generation workflow.

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Frequently Asked Questions

What file format should I use for social media images?

PNG is the best format for graphics, illustrations, and images with text overlays because it is lossless and maintains sharp edges. JPEG is better for photographic images where file size is a concern — use 85–90% quality to balance file size and visual quality. Most platforms accept both. Avoid GIF for static images as the colour limitations and file sizes are rarely optimal.

What is the maximum file size for social media images?

File size limits vary by platform: Twitter/X allows up to 5MB per image, LinkedIn up to 5MB, Instagram up to 8MB for feed posts, Facebook up to 15MB, and YouTube thumbnails up to 2MB. For AI-generated images, PNG files at 1920 x 1080px typically run 1–3MB, which is within the limits of all major platforms.

Do image dimensions affect advertising performance?

Yes, significantly. Advertising platforms have specific dimension requirements for different ad placements, and submitting images at the wrong dimensions either prevents the ad from running or results in automatic cropping that often damages the creative. Always check the current ad spec requirements for the specific placement you are using — these change periodically and differ between placements on the same platform.

Should I use square or landscape images for LinkedIn?

Both work, but they serve different purposes. Landscape (1200 x 627px or 1200 x 630px) is the standard for link preview images and longer-form posts. Square (1200 x 1200px) takes up more vertical space in the mobile feed and can perform better for posts where you want maximum visual impact. Test both formats with your audience and measure which generates more engagement for your specific content type.

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