If you want to display banner on your site or want to show your advertisement on some other website then you must be crazy about their size.
Generally all banners are made with Flash. The exception is animated GIF. No worry you can check famous and recognised Web Banner sizes and name of online banner adverts below.
Web Banner sizes:
Type: Leaderboard ( Size: 728 x 90 pixels):
Type: Full Banner ( Size: 468 x 60 pixels):
Type: Half Banner ( Size: 234 x 60 pixels):
Type: Rectangle ( Size: 180 x 150 pixels):
Type: Square Button ( Size: 125 x 125 pixels):
Type: Medium Rectangle ( Size: 300 x 250 pixels):
Type: Wide Skyscraper ( Size: 160 x 600 pixels):
Type: Skyscraper ( Size: 120 x 600 pixels):
I tried to show Standard Banner Advertisement Sizes are set by the Interactive Advertising Bureau (IAB).
Hope this will help