APlease help I want to make a 3 tier wedding cake that feeds 200 people what size pans should I use
AGoogle cake serving chart. Earlene's and Wilton are common, but different from another. Here's some additional helpful info: http://www.cakecentral.com/t/707763/cake-cutting-chart-again-earlene-vs-indydeb-vs-wilton The charts will answer your current questions, and will be helpful resource for you to keep handy for the future. Luck to you and the bride.
This is what I use to determine what size cakes I need to bake. https://www.bakingit.com/index2.html#tierCombinations