Criteo Rich Media — Lead Form ads are 1:1 still images, up to 25 MB per file, up to 30 seconds long, delivered as PNG, JPG, or MP4. They run in the Open Web / Retail Media — Rich Media Interactive (Managed) placement on Criteo.
| Aspect ratios | 1:1, 2:3, 1.91:1, 16:9, 9:16 |
|---|---|
| Orientation | any |
| Max file size | 25 MB |
| File types | PNG, JPG, MP4 |
| Max duration | 30 sec |
|---|
Required assets: HD logo or branding image, brand book, brand copy, URL redirection link and CTA copy. Image aspect ratios: 1:1, 2:3, 1.91:1. Image file type: PNG or JPG. Max image weight: 5 MB. Video file type: .mp4. Three mandatory video ratios: 1:1, 16:9, 9:16. Max video weight: 25 MB. Video resolution: 720p (or lower). Video max length: 30 seconds. Devices: Desktop, Tablet, Mobile. Service type: Managed Service only.
Official source: https://www.criteo.com/digital-ad-formats/