Find Your Ring Size

Measure the inside diameter or inside circumference of a ring that fits. Make sure it is in the center or largest area of the circle (pictured below). They are the diameter and cirumference.

Make sure you measure the diameter or circumference from the beginning to the mark with a ruler. You can also find a thread and wrap it around the base of the appropriate finger to measure the length from the starting end of the thread. When it becomes a complete circle, make a mark on such string. This will be helpful for you to compare with the chart below.

Inside Diameter Inside Circumference Size
(mm) (mm) U.S.A
&CA
France Germany Australia
UK&NZ
Japan
15.27 47.6 4.5 48 15 1/4 I 8
15.6 49.3 5 49 15 3/4 J 9
16.0 50.6 5.5 50 16 K 10
16.45 51.9 6 52 16 1/2 L 12
16.9 53.1 6.5 53 17 M 13
17.3 54.4 7 54 17 1/4 N 14
17.7 55.7 7.5 56 17 3/4 O 15
18.2 57 8 57 18 P 16
18.6 58.3 8.5 58 18 1/2 Q 17
19.0 59.5 9 60 19 R 18
19.4 60.8 9.5 61 19 1/2 S 19
19.9 62.1 10 62 20 T 20
20.2 63.4 10.5 63 20 1/4 U 22
20.6 64.6 11 65 20 3/4 V 23
21.0 65.9 11.5 66 21 W 24
21.4 67.2 12 67 21 1/4 X 25
21.8 68.5 12.5 68 21 3/4 Y 26
22.2 69.7 13 69 22 Z 27

Pay Attention:

  • The time of the day and also the weather affect the measurement. Because in the early morning or cold weather, fingers are smaller and when the weather is too hot, the fingers are bigger. The evening is the best time to measure your finger size while they are warm.
  • If you hesitate between two sizes, always go with the larger one. If your knuckle is larger than the base of your finger, measure both your knuckle and the base of your finger and select a size in between the two.
  • Please also remember that right hand and left hand are different so the finger sizes are different too.