I am unsure of the size of this ring, but a dime fits freely inside but with virtually zero wiggle room. Please do not ask me to weigh it or to show some proof that it is silver. It is silver but is not marked and its melt value is less than I am selling it for, I am not selling this for scrap. There is a light engraving on the flat of the ring. It is 3 letters in script that I believe are SBP.