What is the structure of a wedding cake and how is it different from a sheet cake?

Each tier of a wedding cake is composed of four layers of cake and three layers of filling. Wedding cake servings are 1"x2" rectangles, approximately 5 1/2 - 6 inches tall. Sheet cakes are composed of two layers of cake and one layer of filling. Sheet cake servings are 2"x2" squares, 3" tall. ... more