This is an agate bracelet. Inner circumference is approximately 16.7cm. The inner circumference is not a perfect circle, so it may vary slightly depending on how it is measured. The stones are slightly different sizes. Size changes are possible only if there are stones in stock. Please consult us in the comments before purchasing for size changes. Size changes are free up to 19cm. ☺️List of other power stones on sale☺️ ↓ #AnjuPowerStoneList 【Free Wrapping】 Simple wrapping with a ribbon and a patterned bag is free, but we cannot accommodate requests after shipping, so please consult us as soon as possible. The packaging method is cushioning material and packaging that does not reveal the contents.