Dave - US 6.75 - 17.12mm inside diameter Ring
Your personal size or material isn't in the shop right now? Just let me know it will be available for you within 24 hours.
If you got any questions or adding wishes to the ring - just press "Contact Designer" on top or mail to email@example.com
and tell me your desire.
Shapeways Material Portfolio
If you don´t know your ringsize
in mm this links may help you: