Giftshop12 Plastic Mooncake Mold Size Large US seller. By Giftshop12. This is One piece of Mooncake mold. Materials: High quality, sturdy plastic. The molds can be used for making mooncakes. Each mooncake's approximate size: 8 cm/3.2" (diameter) x 2.8 cm/1.1" (height) The mold is also perfect for making cold desserts, soaps, and others.