Social Media Image Size Reference
Enter the known values below. Calculations update immediately in the browser and no image is required.
Last checked: 2026-06-29. Platform requirements can change; confirm the official help page before a campaign.
| Use | Dimensions | Ratio / note | Official source |
|---|---|---|---|
| Instagram feed photo | 1080 px wide | 1.91:1 to 3:4 | Meta Help Center |
| Instagram Reel | up to 9:16 | minimum 720 px | Meta Help Center |
| LinkedIn Page logo | 400 × 400 px recommended | 1:1 | LinkedIn Help |
| X profile photo | 400 × 400 px recommended | 1:1 | X Help Center |
| X header | 1500 × 500 px recommended | 3:1 | X Help Center |
| YouTube custom thumbnail | 3840 × 2160 px recommended | 16:9; minimum width 640 px | YouTube Help |
Platforms may re-compress or crop uploads. Keep important text and faces away from the edges.
How to use the result
Start with the destination requirement and treat the output as a planning aid. Dimension and ratio calculations are exact for the entered numbers, while file-size estimates remain a range because image complexity and browser encoders vary.
Apply the calculated dimensions in the full image editor, choose contain or cover, select a format, and inspect the downloaded file.
Open Image ResizerImportant limitations
A calculator cannot add detail to a small original, predict every platform’s later compression, or guarantee visual quality. Keep the source, confirm current platform requirements, and make a test upload or print when the result matters.