Update: I first shared this one all the way back in 2008 and it’s still available 10 years later! I received this a long time ago and it arrive pretty fast.

Do it yourself and find out your ring size. I guess this would come in handy, because I have no idea my own ring size.

To get this free sample go to Blue Nile and fill out the information. Within 7-10 days you should receive your free ring sizer in the mail.

Appears to be U.S only.