Inner circumference: Approximately 15.5-16cm. Slight variations may occur. * If you wish to change the size (up to 17cm free of charge), please let us know after purchase. Blue Apatite: 10.5mm Crystal: 4mm Amazonite: 6mm Crystal: 6mm Blue Apatite: 6mm Blue-Green Fluorite: 6mm 64-faceted Crystal: 8mm New Jade: 8mm Amazonite: 8mm Aquamarine: 8mm White Moonstone: 7mm Peridot: 5mm Fluorite: 10mm Double-strand Ope-ron rubber The Peridot has internal cracks. * The rubber knot is not fixed with adhesive. If it comes out, gently pull it 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. 98