Patisse Cake Cutter Adjustable Stainless Steel 24-30cm This ring is suitable for cakes from 24 to 30 cm. With this cake ring, cutting a cake becomes child's play. All that needs to be done is to slide the ring around the baked cake and cut it to size. Once this is done, you can use a good sharp knife to cut around through the slots and get even slices of cake. The ring is made of stainless steel.