●Each glass is hand crafted by artisans. Emits a deep blue luster, very fantastic and beautiful ●Mysterious Cobalt Blue makes this bracelet attractive ●Material: Glow in the Dark Firefly Glass 0.5 & 0.4 inches (12 & 8 & 10 mm), Black Onyx, 0.3 inches (8 & 10 mm) ●Size: S size: Inner circumference approx. 5.9 - 6.1 inches (15 - 15.5 cm); Operon rubber specifications: rhinestone rondell used ●Comes with a gift box, so you can use it as a gift. Other fiber cloth for cleaning is included