The listing, Snake ring has ended.
This snake ring does not appear to be stamped, but it looks cool (if you like snakes! LOL). As for the size, as a best guess, it fits over a normal size highlighter marker loosely. It has been in my drawer for a long time and can see that there is a very clean part of the ring, so a dunk in some baking soda would probably do it some good. It is a very sturdy ring and when I saw it, I thought it felt like sterling because of the weight...and maybe it is. I am NOT a jewelry expert!