Standard Web Banners

All measurements are in pixels. 

Size	Style	Gif Weight	Flash Weight
468 x 60	Full Banner	20 KB	30 KB
728 x 90	Leaderboard	25 KB	35 KB
336 x 280	Square	25 KB	35 KB
300 x 250	Square	25 KB	35 KB
250 x 250	Square	25 KB	35 KB
160 x 600	Skyscraper	20 KB	30 KB
120 x 600	Skyscraper	20 KB	30 KB
120 x 240	Small Skyscraper	20 KB	30 KB
240 x 400	Fat Skyscraper	25 KB	35 KB
234 x 60	Half Banner	15 KB	20 KB
180 x 150	Rectangle	15 KB	20 KB
125 x 125	Square Button	15 KB	20 KB
120 x 90	Button	10 KB	20 KB
120 x 60	Button	10 KB	20 KB
88 x 31	Button	10 KB	10 KB