Reels ad specs, from Meta's ads guide
Meta's Ads Guide has a spec page for each full-screen Reels placement: Instagram Reels ads and Facebook Reels ads. Neither page shows an update date; we checked both on 25 September 2026.
| Spec | Instagram Reels ads | Facebook Reels ads |
|---|---|---|
| Aspect ratio | 9:16 | 9:16 |
| Recommended resolution | 1440×2560 | 1440×2560 |
| Length | Up to 15 minutes | No maximum limit |
| File size | Up to 4 GB | Up to 4 GB |
| File type | MP4 or MOV; H.264 video, AAC audio at 128 kbps or more | MP4, MOV or GIF |
A ProductToReel video is a 1080×1920 MP4 with H.264 video and AAC audio, 15–20 seconds long. Meta's recommended 1440×2560 is the same 9:16 shape, and Instagram's spec page puts the minimum width at 250 pixels for ads under 30 seconds (500 pixels from 30 seconds), so the file goes in without cropping or resizing.
Full-screen Reels ads are a different product from “Ads on Facebook Reels”, an overlay unit that uses 1:1 video of 4–15 seconds (Meta Ads Guide: Facebook Reels overlay). Our 9:16 videos are made for the full-screen placement.
Keep key text in the safe zone
Both spec pages also define a safe zone for Reels ads: keep text, logos and other key elements out of the top 14 %, the bottom 35 % and 6 % on each side of the frame (Meta Ads Guide: Instagram Reels, Facebook Reels).
On a 1080×1920 video that leaves a box about 950 pixels wide, running from 269 pixels below the top edge down to 1,248 pixels: about half of the frame's height.
ProductToReel doesn't lay its captions out for Meta's safe zone yet. Before you publish, open the ad preview in Ads Manager for the Reels placement and check that the captions and the end card's call to action read clearly.
YouTube Shorts too
The same file works as a YouTube Short. YouTube counts a video with a square or vertical aspect ratio and a length of up to 3 minutes as a Short (YouTube Help: Shorts length) and lists 1080p as the maximum resolution for Shorts (YouTube Help: Shorts uploads), which our 1080×1920 export matches.
For Shorts ads, Google Ads' Demand Gen campaigns recommend a 9:16 video at 1080×1920 for YouTube Shorts (Google Ads Help: Demand Gen assets) and a length of 10–60 seconds (Google Ads Help: Demand Gen videos). Our 15–20-second videos fit both.
YouTube asks creators to disclose realistic content that is meaningfully altered or synthetically generated: set “AI use” to Yes in YouTube Studio's upload flow (YouTube Help: disclosing GenAI content). YouTube can also label a video from valid C2PA Content Credentials (YouTube Help: AI labels). Every ProductToReel video carries Content Credentials that mark it as AI-generated, but don't rely on them for YouTube's label: treat them as a backup and set “AI use” to Yes yourself.
AI labels on Meta
Meta shows an “AI info” label on ads when its own generative AI ad tools make a significant edit or add a photorealistic AI-generated person (Meta newsroom, February 2025). Minor edits such as resizing or colour correction don't need a label, and the label appears in the “About this ad” menu and sometimes next to “Sponsored” (Meta Help Center).
For content made with other tools, Meta says it detects industry signals such as C2PA metadata (Meta newsroom). Every ProductToReel video carries C2PA Content Credentials that mark it as AI-generated, but don't rely on Meta labelling your ad from them: treat them as a backup. Ads about social issues, elections or politics must disclose AI-created or altered video (Meta Help Center). For a product ad, label it as AI-generated in the ad text yourself, so viewers know how it was made.