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. Green Aventurine Tumble Button-cut Crystal Green Aventurine 4mm Malachite 8mm Green Aventurine 64-facet cut 8mm Crystal 6mm 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. 24