Dimensions:

Ad Size
 Width x Height
Full Page
10 1/8" x 16"
Half Page
10 1/8" x 7 1/2" or 6" x 12 1/2"
1/4 Page
4" x 10" or 6" x 6 2/3" or 10 1/8" x 4"
1/8 Page
2" x 10" or 4" x 5" or 6" x 3 1/3"
Bus. Card
4" x 2 1/2" or 2" x 5"