Triangle Acrylic (Plastic) Flat Back Rhinestones are 13mm or about 1/2" in diameter. CPSIA and RoHS compliant. Professional Grade. Perfect for jewelry making, fabric embellishments. Great for garments embelishments Costume making, cosplays. Also used for cards and invitations, face painting and body art. Domestic made high quality gemstones are also highly suited for apparel and accessories manufacturing. Since they lead free they are 100% safe for skin and can be used as body gems. Use your own glue. These are NOT self adhesive (stick on)