International Ring Size Conversion Chart

How to determine your ring size. (We use US Sizes on our website)

  1. Wrap a piece of string or a strip of paper around your finger.
  2. Mark the point where the two ends meet.
  3. Measure the string or paper against a ruler to get the circumference of your finger.
  4. Divide that by 3.14 to get the diameter of your finger.
  5. Look up your ring size using the table below.
Inside Diameter  Inside Circumference Sizes
MM Inches MM Inches British & Australian

 US & Canada

French & Russian German Japanese Swiss
14.86 0.585 46.68 1.84 H 1/2 4 - 15 7 -
15.27 0.601 47.97 1.89 I 1/2 4 1/2 - 15 1/4 8 -
15.70 0.618 49.32 1.94 J 1/2 5 - 15 3/4 9 -
16.10 0.634 50.58 1.99 L 5 1/2 51 3/4 16 - 11 3/4
16.51 0.650 51.87 2.04 M 6 52 3/4 16 1/2 12 12 3/4
16.92 0.666 53.16 2.09 N 6 1/2 54 17 13 14
17.35 0.683 54.51 2.15 O 7 55 1/4 17 1/4 14 15 1/4
17.75 0.699 55.76 2.20 P 7 1/2 56 1/2 17 3/4 15 16 1/2
18.19 0.716 57.15 2.25 Q 8 57 3/4 18 16 17 3/4
18.53 0.729 58.21 2.29 Q 3/4 8 1/2 - 18 1/2 17 -
18.89 0.748 59.34 2.35 R 3/4 9 - 19 18 -
19.41 0.764 60.98 2.40 S 3/4 9 1/2 - 19 1/2 19 -
19.84 0.781 62.33 2.45 T 1/2 10 - 20 20 -
20.20 0.797 63.46 2.50 U 1/2 10 1/2 - 20 1/4 22 -
20.68 0.814 64.97 2.56 V 1/2 11 - 20 3/4 23 -
21.08 0.830 66.22 2.61 W 3/4 11 1/2 - 21 24 -
21.49 0.846 67.51 2.66 Y 12 67 1/2 21 1/4 25 27 1/2
21.69 0.854 68.14 2.68 Y 1/2 12 1/4 - - - -
22.33 0.879 70.15 2.76 Z+1 13 - 22 27 -

    1. 1
      Cut a strip of paper or a piece of string. The paper strip should be approximately 1/2" wide, and 5" long.
    2
    Wrap the paper or string around the finger to be sized. Slide the paper or string up to the knuckle, as the ring must be sized large enough to able to slip off and on, over the knuckle.
     
  1. 3
    Use a pen to mark the string or paper where the long end overlaps.
     
  2. 4
    Measure the mark from the end of the length of paper or string with a ruler.Use the metric side for more accurate sizing.
     
  3. 5
    Locate your ring size by locating your measurement on the printed chart. If the measurement falls in between two sizes, it is recommended that you choose the larger size.