Inner diameter 16mm. A cute-sized Super Seven. It's not a high-grade piece with a lot of inclusions (o^^o), but it has no cloudiness, good transparency, and some beads even have rainbows. Super Seven is said to enhance insight and intuition, leading to a deeper understanding. Holding this stone can help you find new perspectives on problems and trust your intuition when making important decisions. The size is stated as the actual size. Please be sure to check. #NaturalStone #PowerStone