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 after purchase. Larimar (tube-shaped) Peridot 4mm Amethyst 4.5mm Crystal Quartz 6mm Button-cut Crystal Quartz Aquamarine (tube-shaped) Aquamarine 9.3mm Double-strand 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. 108