Inner circumference: Approximately 15-15.5 cm. Slight variations may occur. * If you wish to change the size (up to 17cm free of charge), please let us know after purchase. New Jade 8mm Rondel Crystal 6mm Aquamarine 4.5mm Aquamarine 6mm New Jade 6mm Peridot 4mm Aquamarine 8mm Double-strand Ope-ron rubber * The rubber knots 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. 23