Guides & Tutorials

How to Choose Social Media Image Sizes

Start with the right aspect ratio and avoid unexpected cropping after upload.

Last updated：2026-08-24 · Practical guides · Free tools

Practical detail

Choose the platform and aspect ratio first, and keep important content away from risky edges.

Use it in context

Use a real preview before publishing because platform layouts can change.

Important note: Important note：Important note: Use online tools and calculation results as a starting point for organizing and comparing information.

Quick checklist

Check the input values and units
Compare multiple scenarios when needed
Keep the original data or file
Verify important results independently

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Key takeaway

Use a real preview before publishing because platform layouts can change.

Choose the ratio before the exact size

Different social platforms use different aspect ratios and cropping behaviour. Decide whether the image is for a feed post, story, cover, or ad before choosing the canvas. Avoid forcing one image into every format by simple scaling.

Details that are easy to miss

Common mistakes include placing important text near crop-prone edges and packing too much information into a small image. Preview the final design on a phone to make sure text, logos, and key subjects are not hidden by the interface.

A practical example

Example: keep the core visual but create separate canvases for different platforms instead of relying on automatic cropping. This usually gives you more control over what remains visible.