This is going to be a silly question. I do not have one of those paper ring sizers, I don't have a printer to print one online, and the only converter online I can find only goes up to 13. He's got larger hands. His finger is 3 1/2 inches around. Is there any way that someone can help me figure out his ring size? Maybe if you have a paper ring sizer and a ruler? Please and thank you.