Half Sheet Cake Feeds - 18″ x 24″ 16 cups: Big events, large parties, and weddings: Web the typical half sheet cake is approximately 12 by 18 inches, which offers a total of 216 square inches of cake.
18″ x 24″ 16 cups: Big events, large parties, and weddings: Web the typical half sheet cake is approximately 12 by 18 inches, which offers a total of 216 square inches of cake.