Materials Used: * AAA Green Tiger Eye 8mm * AAA Crystal 4mm * Mother of Pearl 4mm * Silver Rondelle (Flat) * Opelet Rubber Size: ◆ Free Size: Size 10 to 13 (Japanese sizes) Please comment if you would like to request a size change. It uses Opelet rubber, so it has some elasticity. Opelet rubber is basically made in white, but there are 17 colors available, so if you would like to change the color, please comment with your preferred color number. We will exchange it for free. Please see the product page for the Opelet rubber color samples. ❤ Please read the profile before purchasing (・▽・)ノ #PowerStone #PowerStoneRing #NaturalStone #GreenTigerEye #MotherOfPearl #Crystal