Self-Adhesive: These flat back rhinestone are made of acrylic which has sticky back. No need to use glue and just peel and stick! Package Include: These beautiful round gems includes 30 pieces of flat back rhinestones in crystal clear, and a transparent plastic storage box to contain them, enough to decorate a DIY craft. Size Reference: Flat back round acrylic rhinestones: about 1.18"/30mm in diameter, 0.24"/6mm thick. Container: about 5.87"x3.15"x0.7"/149x80x18mm. Exquisite Design: Each rhinestone is glittering with precision cut multi-faceted, serve as beautiful ornaments and shine under the illumination of lights. Suitable For: These flat back rhinestones are suitable for jewelry making, fabric embellishments, commercial displays, party supplies, props, and theatrical performances. Very popular as as costume gems for cosplay.