4 Count Size 3 (78mm) across and 1/2 deep in centers. Instructions & tips sheet included with a link to pdf resin jewelry books. All these molds are flexible and reusable. These molds can also be used with chocolate, fondant, & polymer clay as a push mold. Photos are tips & ideas. Mold release/conditioner is recommended for longer mold life but not required. Made with LDPE (Low Density PolyEthylene) plastic. Made in USA.