Start with where the image will appear

The same image can behave very differently as a post, cover, story, avatar, or link preview. Many social image problems are not caused by poor quality. They happen because the image has the wrong shape for the place where it appears.

Uploading the full original can feel safe, but it often means slower uploads and more platform-side processing. A more predictable approach is to prepare the right ratio first, then keep the file light enough to publish smoothly.

Useful social media image sizes

If you want a small preset list that covers most daily publishing work, these sizes are a practical starting point. They are not the only valid sizes, but they are stable enough for posts, covers, share cards, and vertical screens.

Type Recommended size Aspect ratio Typical use
Universal square 1080 × 1080 1:1 General posts, profile graphics, and many platform feeds
Standard portrait 1080 × 1350 4:5 Instagram-style posts and most mobile feeds
Tall portrait 1242 × 1656 3:4 Cover-style images and stronger vertical layouts
Universal landscape 1200 × 628 1.91:1 Share cards, link previews, post graphics, and OG images
Full-screen vertical 1080 × 1920 9:16 Stories, Reels, short-video covers, and vertical screens

If you only remember a few high-value ratios

  • 1:1 is stable and widely accepted.
  • 4:5 is a strong portrait format for mobile feeds.
  • 1.91:1 is especially useful for share graphics and web previews.
  • 9:16 is the standard for full-screen vertical content, but safe zones matter.

How to choose between them

Square images are the safest choice when the content does not have a strong direction. 4:5 portraits work well in mobile feeds because they use more vertical space without becoming too tall. 3:4 is stronger for covers and note-style layouts, but important content should not sit too close to the edges.

1200 × 628 is mainly for wide share graphics and link previews. It is not a good fit for a tall subject unless you crop intentionally. 9:16 is for full-screen vertical content, but the top and bottom areas are often occupied by interface elements.

Avatar and banner basics

Beyond post images, many platforms also need avatars and banner art. To keep things simple, avatars are easiest to manage at at least 400 × 400, with 800 × 800 as a safer higher-resolution standard.

  • X banner: 1500 × 500
  • YouTube banner: 2560 × 1440, with important text kept in the center safe area
  • Weibo cover: 1200 × 675

Why 1200 × 628 deserves its own preset

This ratio shows up everywhere in link previews, social share cards, and OG images. For content sites, tools, and article pages, it is one of the most reusable export sizes you can keep around.

If you make article covers, social share images, or Open Graph graphics, 1200 × 628 is one of the most dependable presets to save.

9:16 still needs a safe zone

1080 × 1920 is the common full-screen vertical format, but not every part of that canvas is equally safe. Many platforms place status bars at the top and buttons, avatars, or descriptions near the bottom.

  • Leave some breathing room near the top.
  • Do not place key content too close to the bottom.
  • Keep the main subject in the central safe area whenever possible.

Covers need a thumbnail check

A cover image may look fine at full size and fail in the feed. Small text becomes hard to read, faces can sit too close to the edge, and important details may be covered by buttons or labels.

For cover-style images, keep the main subject close to the center, use fewer words, and leave more space around text than you think you need. Platform compression is much less forgiving when the design is already crowded.

A practical publishing workflow

  • Decide whether the image is for a post, a cover, or a share card before picking a ratio.
  • Do not preserve original size blindly if you do not need it.
  • Keep a consistent ratio set across a batch of images when you want the feed to feel cleaner.
  • Check the thumbnail view before posting. Many issues show up there first.

Which images fail most easily on social platforms

Tall graphics with tiny text, detail-heavy artwork, and cover designs with hard contrast often look rough after platform compression. For those images, readability matters more than chasing a smaller file.

Keep a batch visually consistent

If you publish several images together, mixed ratios can make the feed feel messy and can trigger unexpected thumbnail crops. Casual photo dumps can be looser, but product images, tutorials, and portfolio posts usually look better when the images share a similar shape.

They do not all need to be the exact same size. The important thing is that the visual direction is consistent: all square, all portrait, or all wide.

If you want a faster default workflow

The simple rule is to stop chasing the original and instead chase “easy to publish and still looks right.” In many cases, square, 4:5 portrait, 1200 × 628 landscape, and 9:16 full-screen are enough to cover most platforms.

If you are building your own posting presets, those are the sizes worth keeping ready.

Continue with platform-specific guides

How to use the tool for these sizes

Choose “Keep Original Size” when you only want a lighter copy. Choose “Free Crop” when the image has distracting edges or empty space. Choose a platform preset when the final image needs a fixed ratio, then place the crop yourself.

Open the crop and compress tool to prepare a version that is easier to publish on social platforms.