The Paderno World Cuisine pack of 6-round stainless steel pastry rings have a diameter of 4.1cm . They can be used for a wide variety of purposes and create an immense array of dishes. Pastry rings, also referred to as tart rings, are most commonly used for baking tarts as the majority of the dough is exposed to the heat of the oven and quickly becomes crispy. In addition, they can create layered mousse dishes, sponge cakes, genoise or even vegetable dishes. The smooth, rigid sides of this ring offer support for packaging, pouring and pressing.