Amazon.com: Large Resin Tray Mold Oversize Silicone Casting Molds for Resin 1 Large Rectangle, 1 Small Round, 1 Small Square (3 Pack(3 Tray Mold), Free Size) : Arts, Crafts & Sewing
SDJMa Silicone Painting Mat, Silicone Mat for Resin Casting, 21"x16" Non-Stick Silicone Sheet, Silicone Craft Mat with Cleaning Cup for Painting, Art, Handmade, Make Mold, and DIY Creations - Walmart.com
Picture Frame W/ optional Stand Silicone Mold - 4x6", 5x7", and 8x10" - Zapp3D Design LLC
Resin Mold for Photo Frame, Moon Photo Frame Epoxy Resin Molds, Lunar Shape Picture Frames Silicone Molds for Resin Casting, DIY Art Photo Frame Resin Crafts Gifts Home Decor - Walmart.com