This is a handmade Thick but flexible Poly-Plastic mold that is made to use with resin, but, can also be used with Clay, soap, Chocolates ect... This mold features 12 1" wide kawaii puffy rounded edge stars If pieces come out not shiny, simply coat with resin or resin spray. That is what I do with all of my pieces anyway. Do not put in the oven or near heat or flame.