Looking to make a birthday cake from the Momofuku Milk Bar cookbook and it calls for the use of acetate sheets. Having looked at a couple local places for this product unsuccessfully, I turned to Google only to find out they come in a million different sizes and prices. I double-checked the book to see if there was a specified size and didn't see one, and every blog that I came across that did cakes from this book didn't specify either. Can anyone give me some advice on what I should be getting? I can't visualize how 'tall' this cake will be ultimately. I appreciate any feedback!