This is a contemporary sterling silver unisex ring with a uique embossed texture. The silver has been rolled with a pattern plate through a rolling mill and formed by hand. A bar of solid 9ct yellow gold has then been soldered onto it and polished to a high shine.  The silver has been oxidised to to bring out the texture.
 
It's a UK size N1/2.
 
If you are purchasing this from outside the UK, and are unsure of your UK ring size, it can be found here https://www.bottlebee.co.uk/ringsizes