Mold: 3-1/2" x 3-1/2" x 1-3/4" Mold holds 5 oz. of resin when filled. How to Use Resin Molds: Remove any dust, etc. from your mold. This resin mold is reusable and made of durable, smooth polyethylene or polypropylene. Molds do not require mold release when casting with resin, however, it is strongly suggested. We recommend the use of Castin' Craft Mold Release/Conditioner. Instructions: Protect work area with freezer or wax paper. Treat molds with mold release/conditioner. Place mold tray on level surface. Fill mold cavities just below top. Once pieces are cured, turn tray over and press center area of each piece to release, flex if necessary.