I designed this as a novelty item to give members of our local computer gaming club. The size of the ring is 20mm or about 0.787in. It did not print very nice on its face, but printed awesome angled (as if it was sitting on a table) with support.

I would recommend printing at a angle with support. Printed great on my Replicator 2 this way. Use 0.10 mm layer thickness for detail.