Inner circumference: Approximately 16cm. Slight variations may occur. * If you wish to change the size (up to 17cm free of charge), please let me know after purchase. Sugilite: 9mm Rondel 64-facet cut crystal: 8mm Charoite: 8mm Larimar: 7mm Button-cut crystal Crystal: 6mm Double strand of Ope-ron rubber Sugilite has a jet-black color. * The knots in the rubber are not fixed with adhesive. If they come out, gently pull them back in from the opposite side of the stone. The stones may have small scratches, inclusions, color unevenness, dents, and natural cracks. This is handmade by an amateur, so please refrain from purchasing if you are looking for perfection. 15