Standard Cake Sizes and Servings*
Round 2 layer :
6 inch - 10
8 inch - 16
9 inch - 20
10 inch - 26
12 inch - 36
14 inch - 50
Square 2 layer:
8 inch - 20
12 inch - 48
16 inch - 84
Hexagon 2 layer:
6 inch - 6
9 inch - 16
12 inch - 30
15 inch - 48
Sheet 1 layer:
9x13 - 18
11x15 - 26
12x18 - 36
Sheet 2 layer:
9x13 - 36
11x15 - 52
12x18 - 72