Many factors are involved in determining the cost of a cake as every cake is baked/decorated and customised to order. Cake pricing incorporates many variables and specifics, such as the number of servings, the complexity of design elements, and number of tiers. All of my cakes are approximately six inches tall and are made up of four layers of sponge. A taller cake adds to the beauty of the overall finished look and of course allows for more cake to eat.