Size: 7-9.2mm x 8.8-12.4mm. Inner circumference: 16cm. Adjusting the inner circumference smaller is free. Adjusting up to 18cm is available for an additional 100 yen. ☆ Amethyst Energy ☆ Protective effect Inner peace Strengthening intuition Enhancing creativity ☆ Recommended for those who ☆ Seek inner peace Need creative inspiration Want to relieve anxiety Want to cultivate intuition ※ If you wish to purchase multiple items, we will offer a discount of 100 yen per item from the second item onwards. ※ Immediate purchase is welcome ^o^ We will prioritize those who purchase immediately, even if there are comments in progress. ※ There may be inclusions and dents unique to natural stones. Please understand this as a characteristic of natural stones.