Inner circumference: Approximately 15.5cm, 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: 9.5mm Blue Jade: 6mm Crystal: 6mm 64-facet cut crystal: 8mm Button-cut crystal Double-strand Ope-ron rubber The Larimar is not perfectly round and has imperfections such as dents, inclusions, and color variations. * 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. 61