Heart DIY Silicone Keychain Accessory Molds, Resin Casting Molds, for UV Resin, Epoxy Resin Craft Making, WhiteSize: about 51mm long, 138mm wide, 16mm thick, inner diameter 1: 41x44mm, inner diameter 2: 38x45mm, inner diameter 3: 48x40mm, hole: 2.5mm.