Hi, I've made 3 belly cakes and there all different in size. You can make the base by a 14"round or 12"round. I usually go 3 layers with the 14"or 12" then do an 9"or 8"layers on top. You do need to carve a little to get the shape you want though. I don't like using the bowl to bake my belly in because I cannot stand cutting the layers and filling that way. the boobs however I just use the cake scraps and mash them with BC and form the boobies. Just make sure your cakes are frozen prior to carving:) hope this helps
I have made 2 belly cakes. I used stainless steel bowls for both the belly and boobies. they were so easy a little bit of shaping for the belly,but not much. I do have pictures but my computer is on dial-up. Just takes too long to upload!