X image sizes
Profile photo
1:1400×400
Displayed circular.
Verified July 20, 2026
Header / banner
3:11500×500
3:1. Cropping differs by device — keep the center clear.
Verified July 20, 2026
Post image
16:91600×900
16:9. Single-image posts display best at this ratio.
Verified July 20, 2026
Link card (summary large)
300:1571200×628
≈1.91:1 for large image cards.
Verified July 20, 2026