Mousse rings come in a variety of sizes and may be seamless or riveted together, creating a minor crease in the mold. They typically range in size from 2 inches to 12 inches in diameter and 1 to 4 inches high, depending on the dish being prepared. The mousse ring can also be used as a cake, pastry, torte, or appetizer mold as well as for speciality dishes such as rosti potatoes.