Inner diameter: approximately 15.5 cm Bead size: approximately 7.5 mm - 7.9 mm Please allow for some margin of error. ⚠ Color from the elastic band used during purchase has transferred to the bead holes. I soaked them in alcohol and then wiped the holes with acetone, but it didn't come off completely. The rutile itself did not discolor when soaked in alcohol or wiped with acetone, so the inclusions are natural colors and not dyed. After washing thoroughly, I assembled them after drying them in the sun, so there is no smell of alcohol or acetone. Please rest assured. There is some cloudiness in the quartz, but it is beautiful with thick needle type of golden rutile and beads that show cat's eye effect. As these are natural stones, there may be cracks, inclusions, natural dents, black spots, color unevenness, and minor scratches. Natural stone Natural stone bracelet Design bracelet Rutile quartz Gold rutile quartz Taichin rutile quartz Power stone