Supported ad formats and sizes
Commonly used banner sizes, file specifications, and tips for sharp ad creatives.
Nov 4, 2026, 4 min read
Quick flow
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Choose a slot size
Match it to the placement
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Prepare the image
The right pixel size and file
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Check the display
Text stays readable on small screens
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Upload the creative
Use a supported format
Ad sizes follow the slots that publishers provide. Preparing your creative in several sizes lets your ad appear on more websites.
Commonly used sizes
- Leaderboard 728 × 90 pixels, usually at the top of a page.
- Medium rectangle 300 × 250 pixels, suitable inside articles or beside content.
- Large rectangle 336 × 280 pixels.
- Skyscraper 160 × 600 pixels, along the side of a page.
- Mobile banner 320 × 100 pixels for phone screens.
Creative specifications
- Image formats: JPG, PNG, or GIF.
- Keep the file size small so the publisher's page still loads quickly.
- Text in the image must be readable at its actual size.
- Use a thin border or a clear background so the ad does not blend into the website's content.
The latest list of sizes and file limits is shown in the application when you upload your creative.