The Leaderboard ad format is quite popular. It is 728 X 90 in size and sits atop your webpage. As many as four ads fit nicely inside the leaderboard and the ads are arranged from left to right. This can be an attractive layout and will fit with almost any website format.
The Banner format is 468 X 60 in size and can be placed almost anywhere on the page. This format holds two ads nicely and can be used along the side or at the top of content attractively enough. The Half Banner is only 234 X 60 and allows you to place one ad anywhere you desire on your webpage. The Vertical Banner stacks the ads on top of each other and is 120 X 240 in size.
For small ads, place the Button ad format on your website. This format is a 125 X 125 square and holds a single AdSense ad. This can be the perfect showcase piece for an ad, especially when formatted with a background color.
If you want several ads, you might prefer the Sky Scraper format which is 120 X 600 in size. It can hold three or four ads easily and can be placed on either side of the website content. If you want more space, choose the Wide Sky Scraper format which is 160 X 600 in size and can readily hold five Adsense ads.
The Small Rectange is 180 X 150 and holds one AdSense ad very well. The Medium Rectangle format allows three or four ads to be placed inside a 300 X 250 rectangle. The Large Rectangle, perfect for placing four ads inside, is 336 X 280. The Square measures 250 X 250 and holds up to three AdSense ads well.
If you use image-based Adsense ads, you can choose the Leader Board which you will find placed across the top of many websites. It measures 728 X 90. The Banner is a smaller ad that measure 468 X 60. The Sky Scraper and Wide Sky Scraper are also choices for use on the sides of a webpage. Or you can choose the Medium Rectangle format. All of these image ads hold a single image.
There are also various layouts for displaying Link Unit Adsense ads so that they will fit well into your website also. They can be stacked, lined up across the top or bottom and allow just as much variety as the text and image ads.
