X post image size
1200 × 628 px · 1.91:1 · post
1200 × 628
The details
X's creative specs recommend 1.91:1 at 1200×628 for single images, with 800×418 as the minimum. A dependable target for organic in-feed photos too — timeline previews favor this landscape shape.
Source: business.x.com · checked 2026-07-04