If you have a desired inner circumference, please be sure to let us know before purchasing. It will cost an additional 50 yen for every 1 cm increase. Reducing the size is free. Inner circumference: Approximately 16cm (stretches) Blue Carved Emperor Dragon Crystal 10mm Aquamarine 10mm Marine Blue Tiger Eye 10mm Cut Onyx 10mm Rondel *The number of stones may vary depending on the size. [Five-Clawed Emperor Dragon] The five-clawed dragon is a "dragon of the highest quality" with special authority, originally permitted for use only by the "Emperor." The five-clawed dragon is said to have excellent power in the fields of wealth, money, authority, and success. Also, the five-clawed dragon is said to be a (yang) male dragon, and is a symbol of strength, dignity, and authority. [Aquamarine] Aquamarine is the "symbol of a happy marriage." It is popular with women seeking happiness in love, not just marriage. There are many stones for love, but in the case of aquamarine, it has the energy tendency to improve the relationship between current lovers and couples, and strengthen their bond, rather than bringing new encounters. *Because they are natural stones, the color and pattern may vary even in the same stone. *Colors may differ from the actual product due to lighting conditions. Also, natural materials may have cracks and inclusions. Please understand this beforehand.