More to explore:
Cake sizes & servings...I think these are double layers, even the sheet cakes.
Cake Sizes serving sizes
Cake serving chart
Helpful Cake Serving Size Chart, although I'm not sure this is what most wedding cake decorators go by.
Cake sizes servings. Good to know when planning that wedding cake on a budget.
Cake sizes & servings. Good to know. (Now where do you buy 6" cake pans? I want one of those!)
Cake sizes & servings. Good to know
Mini snowflake cakes. - this one I could put in my recipes, but mine would never look this good! :)
How Much Cake Should I Serve? u-createcrafts.com
Cake Size and How Many People They Can Serve | 34 Creative Kitchen Hacks That Every Cook Should Know
Cake Servings Guide.
Cake Servings Guide (and pretty too) #shopfesta
Cake shapes, sizes and slices
Fantastical Sharing of Recipes: Oh, How Pinteresting Weds. #49
Specialty Cakes - Buttercream Bakery and Fine Foods
Serving sizes...I like this way this is presented for customers
cake serving sizes