# Facebook Reels ads specs

> Facebook Reels ads use 9:16 vertical video in MP4, MOV or GIF up to 4 GB, with no maximum length, primary text around 40 characters and a 55-character headline.

Canonical: https://use-addy.site/specs/facebook-reels-ads
Last updated: 2026-10-26

| Spec | Value |
|---|---|
| Aspect ratio | 9:16 recommended |
| Resolution | 1440x2560 recommended; no minimum published |
| File types | MP4, MOV, GIF |
| Max file size | 4 GB |
| Length | No maximum published |
| Primary text | 40 characters recommended |
| Headline | 55 characters recommended |
| Audio | Stereo AAC, 128 kbps or more. Sound strongly recommended. Auto-captioning is not supported, so burn captions in |

## Safe zone

Keep text and faces 269px from the top, 672px from the bottom, 65px from the left and 65px from the right of a 1080x1920 frame. Meta's percentages (14% top, 35% bottom, 6% sides) on a 1080x1920 frame.

## Things that get ads rejected or hidden

- Because Facebook Reels ads do not auto-caption, captions have to be in the video itself.
- The same 9:16 file can serve Instagram Reels, Instagram Stories and Facebook Reels if it respects Meta's shared safe zone.

## Questions

### What size is a Facebook Reels ad?

9:16 vertical. Meta recommends 1440x2560 pixels; 1080x1920 is the same shape.

### Do Facebook Reels ads have captions?

Not automatically. Meta's ads guide says auto-captioning is not supported for Facebook Reels ads, so add burned-in captions before uploading.

## Sources

- [Meta Ads Guide: Facebook Reels video](https://www.facebook.com/business/ads-guide/update/video/facebook-facebook-reels)

## Related

- [TikTok in-feed ads](https://use-addy.site/specs/tiktok-ads)
- [Instagram Reels ads](https://use-addy.site/specs/instagram-reels-ads)
- [Instagram Stories ads](https://use-addy.site/specs/instagram-stories-ads)
- [YouTube Shorts ads](https://use-addy.site/specs/youtube-shorts-ads)