Here's an article: http://www.ehow.com/how_2079268_find-girlfriends-ring-size.html on finding your girl's correct ring size. I recommend trying to get a hold of one of her rings from her jewelry box, measuring it with a string and matching it up with an online ring sizer.... if you can't do this or don't like any of the tips from the article, the nice thing about many jewelry stores is that they will resize a ring, free of charge..... This is a pretty common practice......... and one which my husband and I had to do for my ring...he guessed that I was a size five and I'm actually a 3 1/2 (I have extremely small fingers). Be sure to thoroughly review the company's policy on resizing, to make sure that it is free...otherwise it can cost around $100 to resize at most jewelry repair stores.
