Is a dummy cake the size of a 2 layer cake or would I purchase 2 dummies to make 1 (you know what i mean?). THANKS

dummies are usually 6 inches tall, but can also be purchased in 4". with that being said, i would say that they're actually the height of approximately 3 cakes stacked...it really all depends on how much filling you put though. i love the look of the 6", so that is what i mostly buy, unless i'm mixing my shapes or sizes within the same cake.