his is a Durable plastic that is made for Resin Casting. Pieces pop out easily-May have a few water marks, but a thin coat of resin or resin spray will take care of that. This is a custom Designed Bite Me Heart Mold The hearts have a small bite taken from them The larger heart is 2" the smaller heart is approx. 1 1/2" Do not put in oven. Molded From Love 2016