Extra Large Self Adhesive (stick on with glue) Heart flat back acrylic (plastic) rhinestones are 60mm or 2-3/8". Includes 1 Piece Faceted with flat back and silver backing. Professional Grade, perfect for costumes and displays. These Acrylic jewels are great for displays, POP, merchandising, window displays, wall and theatre decoration, costume making, cosplays! Very popular as as costume gems for cosplay. Strong adhesive for cosplayers! Suitable for party supplies, props, and theatrical performances. 100% Satisfaction Guaranteed! For adult crafting, for professional / hobby use. Not intended for children under 14.