Banners
234 x 60 (half)
468 x 60 (full)
728 x 90 (leaderboard)

Buttons
88 x 31 (micro)
120 x 60 (medium)
	
Squares
125 x 125 (small)
250 x 250 (large)
	
Rectangles
180 x 150 (small)
120 x 240 (vertical)
	
Skyscrapers
120 x 600 (narrow)
160 x 600 (wide)