Quick answer
Create Facebook Reels at 1080 x 1920 pixels with a 9:16 aspect ratio. Keep important text and logos away from the edges because Facebook overlays controls and can show the video in smaller previews outside the full-screen viewer.
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 |
|---|---|---|---|
| Reel master | 1080 x 1920 | 9:16 | Full-screen vertical working canvas |
| Square fallback | 1080 x 1080 | 1:1 | Use only when the content was designed for a feed |
| Cover frame | 1080 x 1920 source | 9:16 | Check all preview placements |
| Caption area | Central safe area | — | Avoid interface controls |
What this page owns
A cross-posted Instagram Reel may be technically compatible with Facebook while still carrying an Instagram-specific call to action, crop, music right, mention, or context. Compatibility is not approval.
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
- Review the Facebook version, not only the Instagram original.
- Remove destination-specific instructions that no longer make sense.
- Keep captions readable with sound off.
- Confirm music and asset permissions for Facebook.
- Check the public Reel after processing.
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 current first look starts with a public website and returns up to six website-grounded talking points before email. Those talking points are not finished posts and do not prove that Boomp knows the owner's voice. Email saves the first look and continues into post ideas. Finished media and posts belong to paid work, with the customer's approval settings controlling what represents the business.
Give Boomp your public website and review the first talking points before email.
Related guides
- Facebook Image Sizes 2026: Posts, Covers, Profiles and Reels
- Vertical Video Size 2026: 1080 x 1920 and 9:16 Explained
- Social Media Safe Zones 2026: Keep Text and Logos Visible
- Social Media Content Quality Checklist: 30 Checks Before Publishing
