Bonds to the surface tooth with braces glue. Curved backside for durable bonding. Reversible non- invasive body art. Quick safe procedure that can be preformed by your dentist. Twinkles is specially designed to bond firmly to the surface of the tooth. Made of gold, elegant, will enhance your smile without risk. Bonding procedure will only work on a live tooth. For bonding to a cap or porcelain consult your dental technician. Twinkles Heart Small 24 K Gold - Art No. 101 Size: 2.1 x 2.1 mm / 0.08 x 0.08 inch Twinkles Heart Large 24 K Gold - Art No. 102 Size: 3 x 3 mm / 0.12 x 0.12 inch