Current sizes, ratios, durations, file limits, and text limits for Reddit placements. Specs change several times a year; confirm against the platform's documentation before production.
| Element | Specification |
|---|---|
| Image | 1200 x 628 (1.91:1), 1080 x 1080 (1:1), or 1080 x 1350 (4:5); JPG or PNG; 3 MB |
| Video | 16:9, 1:1, or 4:5; MP4 or MOV; 4 seconds to 15 minutes; 1 GB; 1080p |
| Text | Headline 300 characters (under 150 recommended); free-form post text |
| Carousel | 2 to 6 cards, 1:1 or 4:5 |
Platform profile: Reddit Ads. Official documentation: https://business.reddithelp.com/.
Build client-approval mockups at these dimensions with the free ad mockup generator. Terms are defined in the creative section of the glossary.
Cite this page:
Agency Echelon. "Reddit ad specs." Agency Echelon Reference, reviewed September 2026. https://agencyechelon.com/reference/specs/reddit/