Inner circumference: Approximately 15-15.5cm, with some variation. * If you wish to change the size (up to 17cm free of charge), please let me know after purchase. Larimar: 7.5mm Milky Quartz: 6mm Queen Conch Shell: Tulip-shaped Peridot: 4mm Aquamarine: 4.5mm Button-cut Crystal Rose Quartz: 6mm Gold parts Double-strand Opelet rubber * The knots in the rubber are not fixed 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. 103