Quick answer
X recommends 400 x 400 pixels for a profile photo and 1500 x 500 for a header. X warns that about 60 pixels at the top and bottom of a header can be cropped on some displays. For post images, use a clear square, portrait, or landscape source and check the live composer preview.
Source check: August 28, 2026. Platform apps, APIs, account types, and third-party publishers can change on different schedules. The final operational check is the preview and public result in the exact path you use.
At a glance
| Surface or choice | Size or limit | Ratio or source | What it means |
|---|---|---|---|
| Profile photo | 400 x 400 | 1:1 | X recommendation; circular display |
| Header | 1500 x 500 | 3:1 | X recommendation; top and bottom may crop |
| Square post | 1080 x 1080 | 1:1 | Practical working canvas |
| Landscape post | 1200 x 675 | 16:9 | Practical working canvas |
| Portrait post | 1080 x 1350 | 4:5 | Preview before publishing |
What this page owns
Profile identity, header branding, and post media crop differently. A header is especially fragile because browser width changes the visible area.
That ownership boundary matters. Boomp uses one clear page for each search job instead of publishing near-duplicate pages that give different answers to the same question.
A dependable production method
- Keep header text and logos away from the top and bottom 60 pixels.
- Preview the profile photo as a circle.
- Check multi-image post layouts separately.
- Use a current composer preview instead of an old crop diagram.
- Open the published post on both a narrow and wide screen.
The last check matters most. A design file, successful export, scheduler acceptance, or API response does not prove that the customer-facing artifact is correct.
Size is only one acceptance test
A technically valid file can still fail the business. Check these questions with the final media and caption together:
- Is every name, date, price, claim, location, and link current?
- Does the crop preserve the subject and the useful words?
- Are captions, contrast, and text alternatives sufficient for the content?
- Does the business have permission to use the people, customer material, music, footage, and marks shown?
- Does the call to action match the destination and what happens next?
- Did a responsible person approve this exact version?
For the full release gate, use the social media content quality checklist.
Where Boomp fits
Boomp fits when the recurring problem is larger than one pixel count. The free first look starts with a public website and returns ten finished posts, with images, a carousel and a short video, before asking for an account or a card. They are the software's reading of the public site and do not prove that Boomp knows the owner's voice. Publishing and the recurring month belong to the paid plans. Finished media and posts belong to paid work, with the customer's approval settings controlling what represents the business.
See ten finished posts made from your website, free.
Related guides
- Social Media Cover Photo Sizes 2026: Headers Without Bad Crops
- Social Media Profile Picture Sizes 2026: One Logo, Safe Crops
- Social Media Aspect Ratios 2026: 1:1, 4:5, 9:16 and 16:9
