Thank you to everyone at Danforth Diamond! My ring arrived today, and it's absolutely perfect. The only part I didn't like was having to wait for it to get here!
When ordering from Danforth Diamond, we suggest that you order the correct ring size if at all possible, but if it HAS to be a surprise and you can't use any of our ring sizing methods we have provided on the site, below are some ideas that may help you make a pretty good guess.
Ask her friends or relatives. If your girlfriend has any inkling that you may be proposing in the near future, she may have told them her engagement ring size.How to Guess a Ring Size: Use One of Her Existing Diamond Rings
Does your girlfriend wear other rings? Use one of your girlfriends other rings to help you determine the perfect size engagement ring you need to purchase.
Other Ways to Guess a Ring Size: