The standard sizes for banners have been formulated by the Interactive Advertising Bureau and extracted from here.

Full Banner - 468 X 60 pixels
Vertical banner - 120 X 240 pixels Button 1 - 120 X 90 pixels


Button 2 - 120 X 60 pixels


Micro button - 88 X 31 pixels		 Wide Skyscraper - 160 X 600 pixels
Half banner - 234 X 60 pixels

Square Button - 125 X 125 pixels

Rectangle - 180 X 150 pixels
Skyscraper - 120 X 600 pixels Square pop-up - 250 X 250 pixels

Vertical Rectangle - 240 X 400 pixels
Medium Rectangle - 300 X 250 pixels
Large Rectangle - 336 X 280 pixels

The other two common banner sizes are: