Most banner ads come in standard sizes. Canned Banners currently offers the most common ad sizes (width x height in pixels):
- 728×90 “leaderboards”
- 300×250 “medium rectangles”
- 160×600 “skyscrapers”
View an image of standard banner ad sizes »
The ad network AdRoll did research in April 2010 and determined that 300×250 banner ads perform 20-30% better than 728×90 or 160×600 ads (on average). View the complete AdRoll research.
There are a lot more banner ad sizes than just the three sizes above. You can find more details at the Interactive Advertising Bureau (IAB).
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