I'm sorry I don't know for sure. It was given to me a while back by a friend and she was not for sure what size it was. I know a size 10 is a little big on me. I tried these rings on and they fit but just to tight. So that is why I guessed it to be a size 8 or 9. I hope this helps.
GIN is when you are auctioning off an item and you can set on price (credits) and a person that whats that item can say I will pay that amount and they can get it without bidding. I really have never used it myself.