First, select a ring that fits for the finger.

Next, measure the diameter opening of that ring.

Use the chart below to determine your ring size.

INTERNAL DIAMETER (MM)

14.1        US / CANADA  3   |   UK / AUS  F

14.9 US / CANADA 4 | UK / AUS H

15.7 US / CANADA 5 | UK / AUS J

16.5 US / CANADA 6 | UK / AUS L

17.3 US / CANADA 7 | UK / AUS N

18.1 US / CANADA 8 | UK / AUS P

19.0 US / CANADA 9 | UK / AUS R

19.8 US / CANADA 10 | UK / AUS T

20.6 US / CANADA 11 | UK / AUS V

21.4 US / CANADA 12 | UK / AUS X

22.2 US / CANADA 13 | UK / AUS Z