20g awg Argentium silver.
Where traditional sterling is mixed with copper, Argentium is mixed with some germanium. This makes it very resistant to both fire scale and tarnishing. It costs a bit more, but well worth it. As with all of our rings, these are saw cut, then tumbled to a mirror finish.
Actual wire diameter: .032" x .032", .8 mm x .8mm
Approx rings per troy ounce