Reddit Ads image & ad sizes

Social

Every Reddit Ads creative format with exact pixels, max weight and accepted file types. 8 sizes, verified 2026-06.

Official documentation: Reddit Ad Unit Specifications ↗ · image ad specifications ↗ · video ad specifications ↗ · carousel ad specifications ↗ · free form ad specifications ↗

Format

Image Ad / Promoted Post - Square (1:1)

Square

Size (px)
Ratio: 1:1
Max weight: 3 MB
Formats: JPG, PNG, GIF

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Image Ad / Promoted Post - Portrait (4:5)

Vertical / Portrait

Size (px)
Ratio: 4:5
Max weight: 3 MB
Formats: JPG, PNG, GIF

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Image Ad / Promoted Post - Landscape (16:9)

Landscape

Size (px)
Ratio: 16:9
Max weight: 3 MB
Formats: JPG, PNG, GIF

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Image Ad / Promoted Post - Landscape (4:3)

Landscape

Size (px)
Ratio: 4:3
Max weight: 3 MB
Formats: JPG, PNG, GIF

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Image/Video Ad Thumbnail (classic-mode)

Other

Size (px)
Ratio: 4:3
Max weight: 500 KB
Formats: JPG, PNG, GIF

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Video Ad (Promoted Video)

Video

Size (px)
Ratio: 1:1 (also 4:5, 4:3, 16:9 supported)
Max weight: 1 GB (512 MB recommended)
Formats: JPG, PNG, GIF

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Carousel Ad Card

Carousel

Size (px)
Ratio: 4:5 (also 1:1, 4:3, 16:9; all cards must match)
Max weight: 20 MB per image (GIFs limited to 3 MB)
Formats: JPG, PNG, GIF

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Free-form Ad (Rich Text Post)

Other

Size (px)
Ratio: 1:1 (embedded media; varies)
Max weight: 10 MB per image; 1 GB per video
Formats: JPG, PNG, GIF

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