These epoxy casting are silicone , they are lightweight, and reusable 3 piece set gives you plethora of designs: Roses, Conch, Shell, and more! Size:4.1 x 1.9 x 0.8 cm/1.6"x 0.7" x 0.31", These epoxy casting craft can be applied to create many projects from home decorations to jewelry designs You can add some exquisite gold powder, gold powder, silver sequins, pigments and various beautiful decorations to the mold, as long as it is filled with epoxy resin, it can bring you beautiful effects, full of your own .