Product Name "Brick Ring". Designed by Japan.

Want to know more puroduct detail? Watch movie.
The material of movie is Silver Glossy.
Available in either stainless steel (antique bronze & gold plated) or 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.)
The brick can be attached by all the sizes.
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