All Outbrain (Native) sizes

Placement	Ratio	Max weight	Formats	Video	Text limits	Confidence
1. Standard Native (Feed Image) Landscape	3:2	2.5 MB	JPGPNG	—	3	High confidence — confirmed in the official documentation
Notes & best practice Outbrain core native in-feed (Standard SmartAd) unit. Recommended size is 1200x800 (3:2 ratio) in JPG or PNG, up to 2.5 MB. Outbrain dynamically resizes and crops the creative to fit publisher widgets. The CTA must be selected from a predefined dropdown list available in 10 languages. Full specification Size (px) Ratio 3:2 Max weight 2.5 MB Formats JPG, PNG Text limits Title100chars Company name60chars Description150chars High confidence — confirmed in the official documentation Source: outbrain.com (opens in a new tab)
2. Clip (Short Looping Video/GIF) Video	3:2	30 MB	GIFMP4	MP4GIF 15 seconds	2	Medium confidence — verified against reputable sources
Notes & best practice Lightweight motion native unit (GIF or MP4) at a 3:2 ratio, up to 30 MB. Maximum duration is 15 seconds. Video loops 3 times, or 1 time on request. Outbrain adds blurred padding if the asset ratio does not match the widget. Full specification Size (px) Ratio 3:2 Max weight 30 MB Cover / thumbnail formats GIF, MP4 Formats · Video MP4, GIF Max duration 15 seconds Max video 30 MB Text limits Headline90chars Company name25chars Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
3. Vertical Video (Beta, full-screen 9:16) Vertical / Portrait	9:16	80 MB	MP4	Up to 3 minutes	—	High confidence — confirmed in the official documentation
Notes & best practice Full-screen 9:16 video for mobile web and in-app placements, run inside Multi-Format (formerly Clip) campaigns; currently in beta. Recommended resolution is 1080x1920 px (minimum 720x1280), MP4 up to 80 MB and 3 minutes, with 15 to 60 seconds recommended. Keep text and logos 15% from the top, CTAs 20% from the bottom, and about 10% padding on each side. Keep key content and text inside the safe zone — the platform UI overlaps the top and bottom of full-screen 9:16 creatives. Full specification Size (px) Ratio 9:16 Max weight 80 MB Formats · Video MP4 Max duration Up to 3 minutes (15-60 seconds recommended) Max video 80 MB High confidence — confirmed in the official documentation Source: outbrain.com (opens in a new tab)
4. Native Video (Managed SmartAd) Video	1.91:1	5 MB	MP4	15 seconds	4	Medium confidence — verified against reputable sources
Notes & best practice In-feed native video SmartAd. MP4 format only. Recommended ratios are 1.91:1, 4:3, 3:2, 1:1, and 1:1.91. Rendered video size ranges from 500x262px to 1222x640px, with a maximum file size of 5 MB (approximately 15 seconds). Brand logo must be JPG or PNG, 1:1 ratio, between 100x100px and 500x500px, up to 2 MB. Full specification Size (px) Ratio 1.91:1 Max weight 5 MB Formats · Video MP4 Max duration 15 seconds Max video 5 MB Text limits Headline30chars Description300chars Company name25chars CTA25chars Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
5. Click-to-Watch Video (in-feed thumbnail) Video	1.54:1	350 MB	JPGPNG	MP4MOV 6 seconds to 3 minutes	2	Medium confidence — verified against reputable sources
Notes & best practice Native thumbnail that opens a full-screen, audio-on video player when clicked. The thumbnail is 800x520 px recommended (400x260 minimum, about 1.54:1), PNG or JPEG up to 2.5 MB. The video must be 16:9, MP4 or MOV (or a VAST/VPAID tag), 6 to 180 seconds, and up to 350 MB. Amplify needs a VAST URL, which its Video Creative Studio can generate. Full specification Size (px) Ratio 1.54:1 Max weight 2.5 MB (thumbnail) Cover / thumbnail formats JPG, PNG Formats · Video MP4, MOV Max duration 6 seconds to 3 minutes (up to 60 seconds recommended) Max video 350 MB (100 MB recommended) Text limits Headline60chars Company name25chars Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
6. App Install Square	1:1	2.5 MB	JPGPNGGIF	—	2	Medium confidence — verified against reputable sources
Notes & best practice App-install native SmartAd. Main image must be 1:1 ratio up to 1200px (renders at 300x300px), using static JPG or PNG up to 2.5 MB, or GIF up to 12 MB. Brand logo or icon must be 1:1 ratio, between 40x40px and 400x400px. CTA is selected from a predefined list in the Amplify dashboard. App store ratings are automatically ingested using the app product ID. Full specification Size (px) Ratio 1:1 Max weight 2.5 MB Formats JPG, PNG, GIF Text limits Title100chars Company name50chars Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
7. Carousel Carousel	1:1	2.5 MB	JPGPNGGIF+1	MP4GIF	2	Medium confidence — verified against reputable sources
Notes & best practice Swipeable multi-card native unit containing 3 to 10 cards. Each card must be 1:1 ratio, between 300px and 1200px. Images can be up to 2.5 MB, while GIF or MP4 files can be up to 30 MB. Brand logo must be 1:1 ratio, between 40px and 400px. CTA is selected from a dropdown of over 20 options. Full specification Size (px) Ratio 1:1 Max weight 2.5 MB Formats JPG, PNG, GIF, MP4 Formats · Video MP4, GIF Max video 30 MB Text limits Title100charsmain title Title100charsper card Company name50chars Main title: 100 chars (60 recommended); Card title: 100 chars; Brand name: 60 chars Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
8. High-Impact / Native Display (Vertical, Mobile) Vertical / Portrait	1:1.3	2.5 MB	JPGPNGMP4	MP4	4	Medium confidence — verified against reputable sources
Notes & best practice Mobile high-impact Native Display SmartAd in a 1:1.3 portrait ratio. Main image must be JPG or PNG, with a minimum size of 670x872px (1200x1560px recommended). Outbrain's High Impact Display spec also accepts MP4 and caps the main image or video at 2.5 MB. Brand logo must be JPG or PNG, 1:1 ratio, minimum 150x150px, and maximum 1.2 MB. Full specification Size (px) Ratio 1:1.3 Max weight 2.5 MB Formats JPG, PNG, MP4 Formats · Video MP4 Max video 2.5 MB Text limits Headline30chars Description90chars Company name25chars CTA15chars Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
9. High-Impact / Native Display (Square, Mobile) Square	1:1	2.5 MB	JPGPNGMP4	MP4	4	High confidence — confirmed in the official documentation
Notes & best practice Square (1:1) variant of the mobile high-impact Native Display SmartAd (1200x1200px). Has the same copy limits as the vertical variant; Outbrain's High Impact Display spec caps the image or video at 2.5 MB. Brand logo must be 1:1, minimum 150x150px. Full specification Size (px) Ratio 1:1 Max weight 2.5 MB Formats JPG, PNG, MP4 Formats · Video MP4 Max video 2.5 MB Text limits Headline30chars Description90chars Company name25chars CTA15chars High confidence — confirmed in the official documentation Source: outbrain.com (opens in a new tab)
10. Standard Display Banner - Medium Rectangle (300x250) Display banner	6:5	2.5 MB	JPGPNG	—	—	High confidence — confirmed in the official documentation
Notes & best practice IAB medium rectangle sold through Outbrain's programmatic Standard Display offering on all devices. Upload a PNG or JPG of up to 2.5 MB. Outbrain also lists 160x600 and 728x90 banners with the same rules. Full specification Size (px) Ratio 6:5 Max weight 2.5 MB Formats JPG, PNG High confidence — confirmed in the official documentation Source: outbrain.com (opens in a new tab)
11. Standard Display Banner - Wide Skyscraper (160x600) Display banner	4:15	2.5 MB	JPGPNG	—	—	High confidence — confirmed in the official documentation
Notes & best practice IAB wide skyscraper sold through Outbrain's programmatic Standard Display offering on all devices. Upload a PNG or JPG of up to 2.5 MB. Outbrain also lists 300x250 and 728x90 banners with the same rules. Full specification Size (px) Ratio 4:15 Max weight 2.5 MB Formats JPG, PNG High confidence — confirmed in the official documentation Source: outbrain.com (opens in a new tab)
12. Standard Display Banner - Leaderboard (728x90) Display banner	8.09:1	2.5 MB	JPGPNG	—	—	High confidence — confirmed in the official documentation
Notes & best practice IAB leaderboard sold through Outbrain's programmatic Standard Display offering on all devices. Upload a PNG or JPG of up to 2.5 MB. Outbrain also lists 300x250 and 160x600 banners with the same rules. Full specification Size (px) Ratio 8.09:1 Max weight 2.5 MB Formats JPG, PNG High confidence — confirmed in the official documentation Source: outbrain.com (opens in a new tab)
13. Outstream Video Video	16:9	250 MB	MP4MPEGMPG+3	60 seconds	—	Medium confidence — verified against reputable sources
Notes & best practice Standalone in-feed outstream video placement. File size ranges from 1 MB to 250 MB. Length up to 60 seconds, up to 30 FPS, and bitrate of 300-3500 Kbps. Supported ratios are landscape (16:9, 1.91:1, 4:3), vertical (9:16, 1:1.91, 4:3), and square (1:1). Full specification Size (px) Ratio 16:9 Max weight 250 MB Formats · Video MP4, MPEG, MPG, MOV, 3GP, AVI Max duration 60 seconds Max video 250 MB Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
14. Pre-Roll Video Video	16:9	100 MB	AVIMOVMP4+5	60 seconds	—	Medium confidence — verified against reputable sources
Notes & best practice Pre-roll video placement. Maximum file size is 100 MB, duration up to 60 seconds, with a 16:9 or 4:3 landscape ratio. Supports VAST 2.0, 3.0, 4.x, and VPAID 2.0 tags. Full specification Size (px) Ratio 16:9 Max weight 100 MB Formats · Video AVI, MOV, MP4, M4V, MPEG, MPG, WEBM, WMV Max duration 60 seconds Max video 100 MB Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
15. Brand Logo / Icon Profile picture	1:1	2 MB	JPGPNG	—	—	Medium confidence — verified against reputable sources
Notes & best practice Square brand logo used across native units. App-install and carousel logos must be 1:1, minimum 40x40px and maximum 400x400px. Native video logos must be 1:1, minimum 100x100px and maximum 500x500px with a 2 MB maximum weight. Native Display (high-impact) logos must be 1:1, minimum 150x150px with a 1.2 MB maximum weight. Full specification Size (px) Ratio 1:1 Max weight 2 MB Formats JPG, PNG Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)
16. Native Image (Square Crop) Square Display size, not an upload sizesee 1	1:1	2.5 MB	JPGPNG	—	3	Medium confidence — verified against reputable sources
Notes & best practice This is a convenience asset size, not a distinct Outbrain placement. Outbrain dynamically crops and resizes the Standard Native image to fit 1:1 thumbnail widgets. Use a 1200x1200px source image for clean cropping. Copy limits are identical to Standard Native. Full specification Size (px) Ratio 1:1 Max weight 2.5 MB Formats JPG, PNG Text limits Title100chars Company name60chars Description150chars Medium confidence — verified against reputable sources Source: outbrain.com (opens in a new tab)

High confidence — confirmed in the official documentation Medium confidence — verified against reputable sources Lower confidence — changes frequently, verify before launch shortened, full wording in the row details reference size, not a separate upload: the checker, kit and size map skip it

Minimum creative kit

Layouts: 11 · placements covered: 14 of 15

Layout	Max weight	Formats	Covers
1:1Image	2.5 MB	JPGPNG	App Install Carousel High-Impact / Native Display (Square, Mobile)
16:9Video	100 MB	MP4MPEGMPGMOVAVI	Outstream Video Pre-Roll Video
3:2Image	2.5 MB	JPGPNG	Standard Native (Feed Image)
1:1.3Image	2.5 MB	JPGPNGMP4	High-Impact / Native Display (Vertical, Mobile)
6:5Image	2.5 MB	JPGPNG	Standard Display Banner - Medium Rectangle (300x250)
4:15Image	2.5 MB	JPGPNG	Standard Display Banner - Wide Skyscraper (160x600)
8.09:1Image	2.5 MB	JPGPNG	Standard Display Banner - Leaderboard (728x90)
3:2Video	30 MB	MP4GIF	Clip (Short Looping Video/GIF)
9:16Video	80 MB	MP4	Vertical Video (Beta, full-screen 9:16)
1.91:1Video	5 MB	MP4	Native Video (Managed SmartAd)
1.54:1Video	350 MB	MP4MOV	Click-to-Watch Video (in-feed thumbnail)

Not in the kit (avatars and formats without a pixel size): Brand Logo / Icon

Text limits

Placements with limits: 8 of 15 · characters unless noted

Placement	Company name	Headline	Description	Title	CTA
Standard Native (Feed Image)	60	—	150	100	—
Clip (Short Looping Video/GIF)	25	90	—	—	—
Native Video (Managed SmartAd)	25	30	300	—	25
Click-to-Watch Video (in-feed thumbnail)	25	60	—	—	—
App Install	50	—	—	100	—
Carousel	50	—	—	100main title100per card	—
High-Impact / Native Display (Vertical, Mobile)	25	30	90	—	15
High-Impact / Native Display (Square, Mobile)	25	30	90	—	15

Video specs

Placements: 9 of 15

Placement	Size (px)	Formats	Max duration	Max video
Clip (Short Looping Video/GIF)	1200×800	MP4, GIF	15 seconds	30 MB
Vertical Video (Beta, full-screen 9:16)	1080×1920	MP4	Up to 3 minutes (15-60 seconds recommended)	80 MB
Native Video (Managed SmartAd)	1222×640	MP4	15 seconds	5 MB
Click-to-Watch Video (in-feed thumbnail)	800×520	MP4, MOV	6 seconds to 3 minutes (up to 60 seconds recommended)	350 MB (100 MB recommended)
Carousel	1200×1200	MP4, GIF	—	30 MB
High-Impact / Native Display (Vertical, Mobile)	1200×1560	MP4	—	2.5 MB
High-Impact / Native Display (Square, Mobile)	1200×1200	MP4	—	2.5 MB
Outstream Video	1280×720	MP4, MPEG, MPG, MOV, 3GP, AVI	60 seconds	250 MB
Pre-Roll Video	1280×720	AVI, MOV, MP4, M4V, MPEG, MPG, WEBM, WMV	60 seconds	100 MB