Nice! It could be used for a man or woman's wedding band or it would make a nice thumb ring. Could you take a coin and perhaps see what size the inside of it is? You could try a dime, penny, nickel or quarter to see. Also, you say it's kind of yellow? Could it be a pale yellow gold? 10k doesn't have a much gold as 14k, so it wouldn't be as yellow. Fanned & watching!! :)