It is 7-10.7 x 10-14.6mm. Inner circumference is 17cm. Adjusting the inner circumference smaller is free, but it can be changed up to 18cm for an additional 100 yen. ☆ Energy of Amethyst ☆ Protective effect Inner peace Strengthening intuition Enhancement of creativity ☆ Recommended for those who ☆ Seek inner peace Need creative inspiration Want to relieve anxiety Want to cultivate intuition ※ If you wish to combine multiple items, we will discount 100 yen per item from the second item onwards. ※ Immediate purchase is OK ^o^ Also, we will prioritize those who purchase immediately, even if comments are in progress. ※ There may be inclusions and dents unique to natural stones. Please understand this as a characteristic of natural stones.