Make stunning resin coasters with these silicone molds from Craft Smart. These molds are designed with a holographic effect, bringing a beautiful rainbow effect to your coasters. Customize with your own glitters, powders, dyes and more!Details:Clear with holographic effect3.7" x 3.7" x 0.4" (9.4cm x 9.4cm x 1cm) circle mold size3.8" x 3.8" x 0.4" (9.7cm x 9.7cm x 1cm) square mold sizeSet of 2 coaster moldsMake sure molds are clean and dry before useRecommend using resin mold release conditionerNot for use with foodSilicone