Feature:Clear silicone molds. Easy to wash,flexible,quick release.Transparent so that the manufacturing process can be clearly observed.Silicone mould for many craft projects: polymer clay,crafting,jewelry making, gem and other craft projects,will bring professional quality to your handmade worksIt is a great shape to make a 3D mineral stone,Crystal, stone, rock, quartz cluster moldsPerfect for resin coaster topping, home decor, gifts, and more.Jewelry Making Steps: Smear the mold release agent on the silicone mold Hit epoxy by boiled water,but can't touch the water. Mix the epoxy to A setable ratio Mix toner into the epoxy Pour the epoxy into mold Wait until epoxy curing After dry , if there some place are not smooth,you can use sandpaper or other tools to let them looks more beautiful. Material:Silicone Color:Clear white Type:A B C D (Optional)Size: Length x Width x ThicknessA 4.5x2.4x0.5cm/1.8"x0.94"x0.2"B 3.5x2.9x0.35cm/1.4"x1.1"x0.14"C3.8x2.1x0.46cm/1.5"x0.83"x0.18"More detailed,please see photo, Note:Transition: 1cm=10mm=0.39inch Please allow 0-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:1 Pc x Jewelry Mold .