Product Name "Piston Head Ring". Designed by Japan.
It is the ring made for those who love the car.
The piston of the parts of a car was used as the motif.

Available in silver.

The default size is 20.6 mm inner diameter but you can customize the size to your liking.
Click personalize to choose your US ring size.(Size support: # 8 to # 13.)
Please refer to a this page.

Conversion chart for ring sizes

US Ring Size      Inside diameter
       8                         18.1mm
       9                         19.0mm
      10                        19.8mm
      11                        20.6mm
      12                        21.4mm
      13                        22.2mm

Please also see other designs.
Shop here.
http://www.shapeways.com/shops/forma

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