ATTENTION: Order a 1/4 SIZE LARGER than the ring sizer that fits you. The plastic ring sizers are the best option that I have found (besides visiting your local jeweler) but are still not perfect.
If you are unsure of your size you can order one of these ring sizing sets and I will get it shipped right out to you the same day.
REMEMBER: It is always best to visit a professional jeweler and have your finger sized properly.
Remove the plastic rings closest to your size from packaging.
Find the size that matches your size most closely.
Order a 1/4 size larger.
Measure at least two times for accuracy. Keep in mind that flat rings (ie Titan ring, rising sun ring) should be ordered half size larger than comfort fit (ie Tsutsumu spinner rings)
This ring sizer can only be shipped domestically.
FYI: RE-SIZING fees start at $20