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.
From Facebook's own ads documentation, checked 2026-10-26.
| 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 for text and faces
269px672pxMeta'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.
Sources
Platforms change specs without notice. If something here is out of date, tell us and we will fix it and update the date.