Part of the SKULPTURES collection. More details at: http://www.scottcamazine.com/3d-printed-skull.html
Necklaces and earring findings may eventually be available directly from Shapeways with your order, but for now you can contact me directly to purchase an inexpensive chain or finding for only $1 plus postage :)
This model has a 17mm internal diameter for the small end of the rib cage. That works out to be about a size 7 ring. ALSO, the current version of the file has an ATTACHED loop at the top, not a twisted wire as shown in my photos of an earlier version of the design