Making my first dummy cake! Need help with sizing and rounding the edges or not? the bottom layer will be an 18" hexagon, next round, next square,next round, next square and top round. please help with sizes to make this large cake look right.
BOTTOM: 18" Hexagon
NEXT: ?" Round
NEXT: ?" Square
NEXT: ?" Round
NEXT: ?" Square
TOP: ?" Round
Thanks
Hi..my rule of thumb is go 2 inches less than the bottom all the way up. So in this case if you were to start with a 12 inch hexagon bottom the next layer up would be the 10 inch round and then 8 inch square and 6 inch round on top. I have never done this many tiers but that's how I would go about it. Hope it helps!
Start by stacking your styrofoam dummies to see what fits. You can't just increase/decrease by two inches when mixing rounds and squares, it won't work. For example, an 8" square won't fit on a 10" round... it needs 11.31 inches, a 10" square needs 14.14 inches, and a 14" square needs 19.8 inches.
Here are the right angle (corner to corner) measurements for square cakes:
4" = 5.66
5" = 7.07
6" = 8.49
7" = 9.9
8" = 11.31
9" = 12.73
10"= 14.14
11"= 15.56
12"= 16.97
13"= 18.38
14"= 19.8
15"= 21.21
16"= 22.63
17"= 24.04
18"= 25.46
Now you can see what size round is required for a square to fit on top.
Here are examples of what would fit on top of your 18" hexagon dummy base:
16" round, 10" or 11" square, 9" round, 6" square, 5" round.
14" round, 9" square, 8" round, 5" square, 4" round.
HTH.
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