I have an order for a square cake. Need to feed 125 people. When I looked at the pans I thought the 16 inch looked really big. I was thinking about 6", 10" & 14". Am fairly new to wedding cakes and would like some opinions. Would 8", 12" & 16" be better. Thanks

if your cakes are 4" tall and you use a serving size of 1"x2"x4" (typical wedding size) then you will get the following servings out of your cakes.

6" = 18
10" = 50
14" = 98
Total = 166 servings w/top tier 148 w/o top tier

I think you will have plenty. Just make sure to charge for the amount of cake you are making, not how many servings the customer wants. Explain to them that these sizes they will be paying for the 166 or 148 servings (depending on if the top tier is your gift to them)