This is a wide-band curling open-front ring made of argentium silver. It is handcrafted and has a round shape with a band width of 0.5 inches. The ring is designed for unisex adults and is size 7.5 US, but is easily made larger or smaller. The band is made by the shop owner.
Argentium silver is a brand of modern tarnish-resistant silver alloys, containing either 94% or 96% silver. Argentium alloys replace some of the copper in the traditional sterling silver with the metalloid germanium. Both argentium 940 and argentium 960 alloys exceed the standard required for hallmarking as sterling silver, and argentium 960 silver meets the standard for hallmarking as Britannia silver. Wikipedia