These silicone molds are huge well made & perfect for resin cabochons. This particular mold makes 5 different shapes approx. 125 -130mm in size with a depth of approx. 5mm. The over size of the mold is 10-12mm These molds are so easy to use. You do not need a releasing agent to pop out your pieces! If you are working with polymer clay, you can bake your clay right in the mold, this will allow you to release the molds without distorting the image. To clean the molds you can wash them with soapy water. Huge 5 Cavity Kawaii Agate Geode Slice Shape Mold For Cabochons, Amethyst Silicone Candy, Clay, Resin Etc, New