Bali Bania - Ring - US 6¾ - 17.12 mm inside diameter
You are not sure about your size or the design on your finger? Just order the cheap plastic version for testing. Other sizes or materials on request. If you got any questions or adding wishes to the ring - just press "Contact Designer" on top or mail to firstname.lastname@example.org and tell me your desire.
Shapeways Material Portfolio
If you don´t know your ringsize in mm this links may help you: