"wide skyscraper" 160x600
"LeaderBoard" 728x90
"large_rectangle" 336x280
"3_1_Rectangle" 300x100
"full_banner" 468x60
"half_banner" 234x60
"pop_under" 720x300
"vertical banner" 120x240
"Medium_Rectangle" 300x250
"half page" 300x600
"skyscraper" 120x600