Tinksky Gypsy Boho Adjustable Oval Changing Mood Ring Finger Ring Material: Alloy. Ring inner diameter: Approx. 17mm(unstretched). Size: US size 7 UK size O. Bear size(W* H): Approx. 2* 1.9cm. Suitable for both men and wowen to wear. Delicate and sparkling color changing designed on the ring to make it more charming. A simple and romantic women's finger ring for your friend or lover.