Bead Diameter: Approximately 10mm Inner Diameter: Approximately 16cm I purchased this as a hobby in March 2025, but I need funds, so I am putting it up for sale. If you purchase this item along with other items, I will offer a 300 yen discount on the total price, so please feel free to contact me. After I purchased it, I stored each one carefully in a zip-lock bag, and I only took them out for photos/inspection, so there is no dirt other than initial scratches, and it is unused. Thank you. #NaturalStone #PowerStone