so, the one he lost was too big, given it fell off in the horse paddock?
How will you know the right size?

Im asking cos my DH did the same thing earlier this year, minus the horse paddock. He just lost it when he was drunk at the pub :/
I want to get it replaced, its about the same cost as what you are looking at, but i don want to too big again, and I have NFI how to get his ring size!