Sharethrough image & ad sizes

Native High confidence — confirmed in the official documentation. Verified 2026-10

Drop a creative or type a size — see every placement it fits

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11placements
8layouts to produce
8aspect ratios

Image 7 Video 3 Audio 1

Official documentation

Size map

Every frame is drawn to the same scale · largest 1920×1080

1920×1080 10
1280×720 8
1200×627 1
600×600 2
300×600 7
640×480 9
300×300 3
300×250 4
728×90 5
320×50 6

Numbers match the rows of the size table

No fixed pixel size Rewarded Video (In-App)

All Sharethrough sizes

Placement	Size (px)	Ratio	Max weight	Formats	Video · Audio	Text limits	Confidence
1. Native Display - Main Image (Recommended) Landscape		1.91:1	—	JPGPNGGIF	—	4	High confidence — confirmed in the official documentation
Notes & best practice Primary hero image for the Sharethrough (STX) native unit on desktop and mobile. Recommended size is 1200x627 (StackAdapt uses 1200x628). Minimum dimensions vary by DSP. The Trade Desk requires at least 320x180 for mobile and 600x315 for desktop, and accepts up to 2000x2000. StackAdapt accepts 1200x628 or 600x600. Use high resolution (300 ppi and above). Do not overlay text on the image. Character limits vary by DSP. Full specification Size (px) Ratio 1.91:1 Max weight Varies by DSP: 2 MB (The Trade Desk, Yahoo DSP), 1200 KB (DV360), 1 MB (Xandr); StackAdapt optimal 750 KB Formats JPG, PNG, GIF Text limits Headline90charsrecommended, The Trade Desk / STX Description140charsThe Trade Desk / STX Headline55charsmax, StackAdapt Description120charsmax, StackAdapt Title50charsmax, Yahoo DSP Description90charsmax, Yahoo DSP Advertiser name25charsmax, Yahoo DSP Character limits vary by DSP integration. The Trade Desk / STX: headline recommended up to 90 chars, description up to 140 chars. StackAdapt: headline max 55, description max 120. Yahoo DSP: title max 50, description max 90, advertiser name max 25. Brand shown as 'Ad by <brand>' / 'Sponsored by <brand>'. CTA/DSP support varies by integration. High confidence — confirmed in the official documentation Source: support.sharethrough.com (opens in a new tab)
2. Native Display - Square Image Square		1:1	—	JPGPNGGIF	—	2	High confidence — confirmed in the official documentation
Notes & best practice Accepted square main-image size. StackAdapt accepts both 1200x628 and 600x600; in DV360, Sharethrough asks buyers to leave the optional square image empty. The 600x600 size is StackAdapt's small square option used for 1:1 native placements. Do not overlay text on the image. Full specification Size (px) Ratio 1:1 Max weight Not officially published (StackAdapt: 750 KB optimal) Formats JPG, PNG, GIF Text limits Headline55chars Description120chars High confidence — confirmed in the official documentation Source: support.sharethrough.com (opens in a new tab)
3. Native Display - Brand Logo / Icon Square		1:1	—	JPGPNG	—		Medium confidence — verified against reputable sources
Notes & best practice Brand logo or icon with a 1:1 ratio. Transparent PNG is preferred. Specs vary by DSP: The Trade Desk, Yahoo DSP, DV360 and Xandr list 100x100, Amazon DSP lists 300x300, and Yahoo DSP accepts logos from 82x82. Uploading at 300x300 ensures clean downscaling. This asset is optional and does not render on all placements. Full specification Size (px) Ratio 1:1 Max weight Varies by DSP: 1 MB (Amazon DSP), 1200 KB (DV360), 200 KB (Xandr) Formats JPG, PNG Text limits Displayed alongside the brand/sponsor name ('Ad by <brand>' or 'Sponsored by <brand>'). Medium confidence — verified against reputable sources Source: support.sharethrough.com (opens in a new tab)
4. Display - Medium Rectangle (300x250) Display banner		6:5	—	—	—	4	High confidence — confirmed in the official documentation
Notes & best practice Standard 300x250 display banner bought through a DSP on the Equativ (Sharethrough) exchange. Equativ can wrap it with a headline frame (Display Headlines): headline up to 40 characters, optional description up to 64, 'Ad by' text up to 20 and CTA up to 15, plus an optional square logo of at least 48x48. Countdown, sports-ticker and weather enhancements also run on this size. File weight and format follow the DSP's display rules. Full specification Size (px) Ratio 6:5 Max weight Not officially published (StackAdapt: 750 KB optimal) Text limits Headline40charsmax, Display Headlines Description64charsmax, optional Advertiser name20charsmax, 'Ad by' text CTA15charsmax High confidence — confirmed in the official documentation Source: docs.google.com (opens in a new tab)
5. Display - Leaderboard (728x90) Display banner		8.09:1	—	—	—	3	High confidence — confirmed in the official documentation
Notes & best practice Standard 728x90 display banner bought through a DSP on the Equativ (Sharethrough) exchange. Equativ's Display Headlines enhancement can add a headline (up to 40 characters), 'Ad by' text (up to 20) and a CTA (up to 15) to this size, but no description. Countdown and sports-ticker enhancements also run on it. File weight and format follow the DSP's display rules. Full specification Size (px) Ratio 8.09:1 Max weight Not officially published (StackAdapt: 750 KB optimal) Text limits Headline40charsmax, Display Headlines Advertiser name20charsmax, 'Ad by' text CTA15charsmax High confidence — confirmed in the official documentation Source: docs.google.com (opens in a new tab)
6. Display - Mobile Leaderboard (320x50) Display banner		6.4:1	—	—	—	4	High confidence — confirmed in the official documentation
Notes & best practice Standard 320x50 mobile banner bought through a DSP on the Equativ (Sharethrough) exchange. Equativ can wrap it with a headline frame (Display Headlines): headline up to 40 characters, optional description up to 64, 'Ad by' text up to 20 and CTA up to 15. Countdown, sports-ticker and weather enhancements also run on this size. File weight and format follow the DSP's display rules. Full specification Size (px) Ratio 6.4:1 Max weight Not officially published (StackAdapt: 750 KB optimal) Text limits Headline40charsmax, Display Headlines Description64charsmax, optional Advertiser name20charsmax, 'Ad by' text CTA15charsmax High confidence — confirmed in the official documentation Source: docs.google.com (opens in a new tab)
7. Display Story Ad (300x600) Display banner		1:2	150 KB	PNGJPG	—	—	High confidence — confirmed in the official documentation
Notes & best practice Story-style display ad in a 300x600 slot with a CTA, sold by Equativ as a managed service only. Each frame is a 300x600 PNG or JPEG up to 150 KB; Equativ also asks for a 1080x1080 brand logo, CTA text and a landing page URL. Full specification Size (px) Ratio 1:2 Max weight 150 KB Formats PNG, JPG High confidence — confirmed in the official documentation Source: docs.google.com (opens in a new tab)
8. Native Video - 16:9 (Landscape) Video		16:9	1 GB	MP4	Up to 5 minutes	2	Medium confidence — verified against reputable sources
Notes & best practice Sharethrough native and outstream video. Sharethrough's own outstream specs require a 16:9 MP4 file up to 1 GB; DV360 also accepts 4:3 and 1.9:1. The Trade Desk takes MP4 files up to 2 GB and 5 minutes long. DV360 allows uploads up to 1 GB but caps the serving file at 20 MB. Duration and encoding are set by the host DSP. The 1280x720 dimension is a common 16:9 upload size. Full specification Size (px) Ratio 16:9 Max weight 1 GB Formats · Video MP4 Max duration Up to 5 minutes (The Trade Desk) Max video 1 GB Text limits Headline90chars Description140chars Medium confidence — verified against reputable sources Source: support.sharethrough.com (opens in a new tab)
9. Native Video - 4:3 Video		4:3	1 GB	MP4MOVWEBM+2	—	2	Lower confidence — changes frequently, verify before launch
Notes & best practice 4:3 native video, accepted by DV360 alongside 16:9 and 1.9:1; Sharethrough's own outstream specs require 16:9. DV360 accepts uploads up to 1 GB. Duration and bitrate follow the host DSP specs. The 640x480 dimension is a standard 4:3 size. Full specification Size (px) Ratio 4:3 Max weight 1 GB Formats · Video MP4, MOV, WEBM, MPG, MPEG Max video 1 GB Text limits Headline50chars Description140chars Lower confidence — changes frequently, verify before launch Source: support.sharethrough.com (opens in a new tab)
10. CTV & In-Stream Video (16:9) Video		16:9	10 GB	MP4MOV	15 or 30 seconds	—	High confidence — confirmed in the official documentation
Notes & best practice Connected-TV and online in-stream video on the Equativ (Sharethrough) exchange, bought through a DSP as a VAST 2.0, 3.0 or 4.0 tag; VPAID and MRAID are not supported. Use a 1920x1080 MP4 or MOV at 10,000-30,000 kbps, up to 10 GB, cut to 15 or 30 seconds. Full specification Size (px) Ratio 16:9 Max weight 10 GB Formats · Video MP4, MOV Max duration 15 or 30 seconds Max video 10 GB High confidence — confirmed in the official documentation Source: support.sharethrough.com (opens in a new tab)
11. Rewarded Video (In-App) Video	Audio ad	—	—	MP4	Up to 30 seconds	—	High confidence — confirmed in the official documentation
Notes & best practice Full-screen in-app video that users choose to watch in exchange for a reward, on tablets and phones, with skippable and non-skippable options. It is bought as a PMP or programmatic guaranteed deal on the Equativ exchange. The file must be MP4 and VPAID is not supported; Equativ publishes no pixel size or file weight. This format has no fixed pixel size — the specs below are what matter. Full specification Format Audio ad Max weight Not officially published (StackAdapt: 750 KB optimal) Formats · Audio MP4 Max duration Up to 30 seconds High confidence — confirmed in the official documentation Source: docs.google.com (opens in a new tab)
12. Native Display - Mobile Thumbnail (Minimum) Landscape Minimum accepted sizesee 1		16:9	2 MB The Trade Desk	JPGPNGGIF	—	—	High confidence — confirmed in the official documentation
Notes & best practice Minimum main-image size for mobile native placements on The Trade Desk STX. The desktop minimum is 600x315 and the maximum is 2000x2000. Yahoo DSP requires at least 200x200 for mobile and 627x627 for mobile-web. Use a 1200x627 asset to cover all placements. This entry represents the minimum floor dimension. Full specification Size (px) Ratio 16:9 Max weight 2 MB (The Trade Desk) Formats JPG, PNG, GIF Inherits the unit headline and description limits (vary by DSP). High confidence — confirmed in the official documentation Source: support.sharethrough.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: 8 · placements covered: 9 of 11

Layout	Max weight	Formats	Covers
16:9Video	1 GBfor 1280×720 px	MP4	Native Video - 16:9 (Landscape)CTV & In-Stream Video (16:9)
1.91:1Image	—	JPGPNGGIF	Native Display - Main Image (Recommended)
1:1Image	—	JPGPNGGIF	Native Display - Square Image
6:5Image	—	—	Display - Medium Rectangle (300x250)
8.09:1Image	—	—	Display - Leaderboard (728x90)
6.4:1Image	—	—	Display - Mobile Leaderboard (320x50)
1:2Image	150 KB	PNGJPG	Display Story Ad (300x600)
4:3Video	1 GB	MP4MOVWEBMMPGMPEG	Native Video - 4:3

Not in the kit (avatars and formats without a pixel size): Native Display - Brand Logo / Icon, Rewarded Video (In-App)

Text limits

Placements with limits: 7 of 11 · characters unless noted

Placement	Headline	Description	Advertiser name	CTA	Title
Native Display - Main Image (Recommended)	90recommended, The Trade Desk / STX55max, StackAdapt	140The Trade Desk / STX120max, StackAdapt90max, Yahoo DSP	25max, Yahoo DSP	—	50max, Yahoo DSP
Native Display - Square Image	55	120	—	—	—
Native Display - Brand Logo / Icon	Displayed alongside the brand/sponsor name ('Ad by <brand>' or 'Sponsored by <brand>').
Display - Medium Rectangle (300x250)	40max, Display Headlines	64max, optional	20max, 'Ad by' text	15max	—
Display - Leaderboard (728x90)	40max, Display Headlines	—	20max, 'Ad by' text	15max	—
Display - Mobile Leaderboard (320x50)	40max, Display Headlines	64max, optional	20max, 'Ad by' text	15max	—
Native Video - 16:9 (Landscape)	90	140	—	—	—
Native Video - 4:3	50	140	—	—	—

Video & audio specs

Placements: 4 of 11

Placement	Size (px)	Formats	Max duration	Max weight
Native Video - 16:9 (Landscape)	1280×720	MP4	Up to 5 minutes (The Trade Desk)	1 GB
Native Video - 4:3	640×480	MP4, MOV, WEBM, MPG, MPEG	—	1 GB
CTV & In-Stream Video (16:9)	1920×1080	MP4, MOV	15 or 30 seconds	10 GB
Rewarded Video (In-App)	Audio ad	MP4	Up to 30 seconds	Not officially published (StackAdapt: 750 KB optimal)