This is a ring in Fine Silver (99.9% purity).
It is a piece composed of woven silver ribbons, with a concave surface.
 
As you can see in the image, it is an adjustable ring, but it is not open on its back.
 
The fact that it get thiner at the back makes it very comfortable to wear.
 
If you want, you can tell us what size you usually wear so we can send it to you already adjusted. 
 
Dimensions: 
Front length: 3 cm
Back length: 7mm (will vary slightly depending on how it fits)