X header photo size
1500 × 500 px · 3:1 · banner
1500 × 500
The details
Profile header at 1500×500 (3:1). X itself warns that the top and bottom may be slightly cropped depending on device and that the profile photo covers part of the bottom-left, so design for the center.
Safe area: Your profile photo overlaps the bottom-left corner and the top/bottom can be cropped depending on device and browser — keep key elements centered.
Source: help.x.com · checked 2026-07-04