◆Size: inner circumference approx 16cm (±0.5cm). High grade in terms of gloss, shine, and transparency. ◆Handmade accessories using high-quality natural stones carefully selected by craftsmen. It is also popular as a gift for birthdays, school entrance celebrations, employment celebrations, promotion celebrations, independence celebrations, farewell gifts, Christmas, etc. ◆Since it is made of elastic rubber, both men and women can choose the stone size of their choice. Ball sizes of 6mm and 8mm are mainly for women, and 10-12mm are common for both men and women. Please be careful not to pull too hard as it may break.