Inner circumference: Approximately 15cm. Slight variations may occur. * If you would like to change the size (up to 17cm free of charge), please let me know after purchase. Madagascar Rose Quartz: 9mm Button-cut Crystal Aquamarine: 6mm Citrine (heat-treated): 4mm 64-facet Cut Crystal: 6mm Lavender Amethyst: 6mm Peridot: 4mm Rose Quartz: 8mm Prehnite: 6mm Amethyst: 4.5mm Rose Quartz: 6mm Larimar: 8.4mm 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. 44