Our Essentials Charm Cutter Pack includes these four cutter shapes: Circle Arch Oval Rounded Square They are the perfect size for creating charms that you can incorporate into charm bracelets, keychains, earrings and more! Use them by themselves, or add textures, transfers, or other embellishments. Available in 10mm, 12mm, 15mm and 18mm sizes. Material: PLA plastic, a biodegradable thermoplastic polymer. Colour: Colour will be at random and is subject to availability. Use: Please see our page "Cutter Use and Care" for tips on getting the perfect cut. Care: Please do not put MyClayCo cutters in the dishwasher. The material may warp if exposed to high heat. Please see our page "Cutter Use and Care" for instructions on caring for your cutters.