The 9 pc set of Pastry Cutters by Matfer is made entirely of Exoglass, Matfer's proprietary material that will not warp and will stay sharper longer than inexpensive plastic pastry cutters. The rounded edge on the top of these cutters is designed with ergonomics in mind and both large and tiny handed users will find them to be comfortable and usable. High volume commercial bakeries and home cooks alike will find many qualities to love in this set. Set of 9. Diameter 100mm.