Volume Pattern ring created using ShapeJS.
This ring is a US size 11.5. If you'd like to make your own ring with a different size or pattern go here:
http://shapejs.shapeways.com/ide?shapeJsScript=/rrstatic/javascript/shapejs/examples/volpattern_ring.js
You can read a blog post about how it was created here:
http://www.shapeways.com/blog/archives/24592-learn-shapejs-volume-pattern-ring.html