Meta's ads guide recommends 4:5 at 1440 x 1800 pixels for Facebook feed video ads, as MP4, MOV or GIF, up to 4 GB, from 1 second to 241 minutes long, with a minimum of 120 x 120 pixels. The long maximum is not a suggestion to use it: the recommended shape is the useful part. And since none of the AI video models on 8frame generates 4:5, the feed version comes from a crop.
TL;DR
| Spec | Facebook feed video ads |
|---|---|
| Aspect ratio | 4:5 |
| Resolution | 1440 x 1800 |
| Formats | MP4, MOV, GIF |
| File size | up to 4 GB |
| Length | 1 s to 241 min |
| Minimum size | 120 x 120 |
From Meta's Facebook Ads Guide, Facebook feed video specs, checked 2026-09-29.
Getting 4:5 from AI video
The closest shape the video models on 8frame generate is 3:4 (0.75, against 4:5 at 0.8), offered by Wan 3.0, Seedance, Happy Horse, Hailuo H3, Grok Imagine and Runway Gen-4 Turbo. Crop a little off the top and bottom and you have 4:5. From 9:16 the crop is bigger but one clip then covers Reels and Stories too.
From a 1080 x 1920 vertical generation, a 4:5 crop gives 1080 x 1350. From 3:4 the crop keeps the full width and trims only a little off the top and bottom.
Meta's 1440 x 1800 is a recommendation; a 1080 x 1350 file is above the 120 x 120 minimum. Per-model shapes are in AI video aspect ratios by model, and Instagram's placements in Instagram feed and Stories specs.
Length
Meta allows up to 241 minutes, but one AI generation on 8frame runs at most 30 seconds (Wan 3.0, Seedance 2.5). Feed ads are usually several short shots joined, which Merge Videos does for 10 credits. For choosing models, see best AI video for Facebook ads.
FAQ
What size should a Facebook video ad be? 4:5 at 1440 x 1800 pixels is Meta's recommendation for feed video ads.
How long can a Facebook video ad be? From 1 second to 241 minutes, per Meta's ads guide.
What is the maximum file size for a Facebook video ad? 4 GB, as MP4, MOV or GIF.
Can I make a 4:5 Facebook ad with AI video? Yes, by cropping: generate 3:4 or 9:16, then crop to 4:5.
Sources
- Meta Facebook Ads Guide, Facebook feed video specs: 4:5, 1440 x 1800, MP4, MOV or GIF, up to 4 GB, 1 second to 241 minutes, minimum 120 x 120: facebook.com/business/ads-guide/update/video/facebook-feed, fetched 2026-09-29
- 8frame aspect ratios and clip lengths: the 8frame tool registry, 2026-09-29
Generate 3:4 or 9:16, crop to 4:5, keep it short. The 8frame canvas is free and unlimited, and generation is paid from $19/month.