※ This item is being sold as is, and the size cannot be changed. Please consider purchasing if the size fits you. Inner circumference: Approximately 15.5-16cm, with some variation. Aquamarine: 10mm 64-facet cut crystal: 6mm Crystal: 6mm Aquamarine: 6mm Amethyst: 4mm Double-strand nylon elastic cord ※ The knots in the elastic cord are not secured with adhesive. If a knot comes loose, gently pull it back in from the opposite side of the stones. 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. 96