Inner circumference: Approximately 15cm, with some margin of error. ※ If you wish to change the size (up to 17cm free of charge), please let me know, even after purchase. Larimar: 8mm Button-cut crystal Gold spacer Crystal: 6mm Cut ruby: 4mm Strawberry quartz: 6mm Pink epidote: 8mm Double strand of Ope-ron rubber ※ The knots in the rubber are not secured with adhesive. If they come loose, gently pull them back in from the opposite side of the stone. The stones may have small scratches, inclusions, color variations, dents, and natural cracks. This is handmade by an amateur, so please refrain from purchasing if you are looking for perfection. 52