I have a bride who wants the petal shape for "about" 82 people. I used Wilton and came up with a 15" and a 9"- does this sound right? Fat Daddio, which I prefer, has different sizes. I'll have to buy the pans and was wondering if Fat Daddio is as different as they sound. Also, will a 15" and 9" look ok? I only have the 2 small ones and it's hard to tell. Thanks!