Quoting: sapphire
get one of her existing rings that she wears on the same finger
Quoting: plk123
try one of her rings on your own fingers then measure your own digit
She doesn't wear any rings. Next time I'm at her apartment and she's at work or in the bath I think I'll take a peek in her jewelry box to see if there is some in there.
Quoting: miranda
he might wan too keep it a secret
Thank you miranda. Generally when a man asks a woman to marry her he doesn't want her to know that he's going to do it.
Quoting: covkid65
get her to wear tight jeans and ask her to bend over :)
Good idea but that won't help me with her ring size. ;-)