Quality Advertising for Quality Websites

	LeaderBoard Banner The 728×90 banner ad unit is an IAB standard ad unit also known as is known as a Leaderboard Banner, Super Banner or just a Leaderboard. The leaderboard size 728 pixels wide by 90 pixels tall. A 728×90 ad is usually placed at the top of a page, so as to be seen by the user immediately when the page loads. Leaderboard ads are possibly the most valuable/costly as they generally perform really well.
	Medium Rectangle The 300×250 ad unit is an IAB standard ad unit. It has the dimensions of 300 pixels wide by 250 pixels tall. This ad size is also known as an MPU in the UK. In the US a 300×250 is known as a Med Rec, MREC, or Medium Rectangle. This ad unit is commonly placed above the fold. It is often used as part of a multi-size ad slot with a 300×600 ad unit. It is generally the best performing ad size, as well as the most expensive/valuable.
	Wide Skyscraper The 160×600 ad size is an IAB standard ad unit with the dimensions of 160 pixels wide by 600 pixels tall. This ad size is known as a skyscraper ad, a super skyscraper or sometimes a wide skyscraper. The 160×600 ad size is generally placed on the side of a page, so as to show users an ad as they scroll down the page. This makes skyscrapers (of both types) somewhat immune to demands for above the fold placements.