Determining Your Ring Size 

Rings are often worn every day.  Like your shoes,  a ring should fit  comfortably.  Correctly sizing a ring is important.

A single ring size,  from size 5 to size 6,  only increases the diameter of a ring by 0.032 inches  -  less than 4% of an inch?  Here are several tips to help you measure your finger and assure that your ring fits comfortably.

  1. Have your finger size measured at the end of the day when your fingers are usually largest. 
  2. Don't measure finger sizes when your hands are cold.  
  3. The width of a ring is an important factor in determining the right finger size.  A wider ring may require a slightly larger size (1/4 to 1/2 large),  because it covers more of your finger.
  4. If possible, have your finger measured several times on different days.  This is the best way to get a true reading.
  5. We find that often, your ring finger is about the same as your USA adult shoe size! If you don't know your ring size, it's probably pretty close to your shoe size.

***   International Ring Size Conversion Chart  ***

U.S.& Canada 
Standard
Great Britain  France   Germany   Japan   Switzerland  Diameter 
in Inches
Diameter 
in Millimeters
1/2 A ... ... ... ... ... ...
1 B ... ... 1 ... .487 12.37
1-1/2 C ... ... ... ... .503 12.78
2 D 41-1/2 13-1/4 2 1-1/2 .52 13.21
2-1/2 E 42-3/4 13-3/4 3 2-3/4 .536 13.61
3 F 44 14 4 4 .553 14.05
... G 45-1/4 ... 5 5-1/4 ... ...
3-1/2 ... ... 14-1/2 ... ... .569 14.45
3-3/4 H 46-1/2 ... 6-1/2 6-1/2 ... ...
4 H-1/2 ... 15 7 ... .585 14.86
4-1/4 I 47-3/4 ... ... 7-3/4 ... ...
4-1/2 I-1/2 ... 15-1/4 8 ... .601 15.27
... J 49 ... ... 9 ... ...
5 J-1/2 ... 15-3/4 9 ... .618 15.70
... K 50 ... ... 10 ... ...
5-1/2 L 51-3/4 16 ... 11-3/4 .634 16.10
... L-1/2 ... ... 11 ... ... ...
6 M 52-3/4 16-1/2 12 12-3/4 .650 16.51
6-1/2 N 54 17 13 14 .666 16.92
7 O 55-1/4 17-1/4 14 15-1/4 .683 17.35
7-1/2 P 56-1/2 17-3/4 15 16-1/2 .699 17.75
8 Q 57-3/4 18 16 17-3/4 .716 18.19
8-1/2 ... ... 18-1/2 17 ... .732 18.59
... R 59 ... ... 19 ... ...
9 ... ... 19 18 ... .748 18.99
... S 60-1/4 ... ... 20-1/4 ... ...
9-1/2 ... ... 19-1/2 19 ... .764 19.41
... T 61-1/2 ... ... 21-1/2 ... ...
10 T-1/2 ... 20 20 ... .781 19.84
10-1/4 U 62-3/4 ... 21 22-3/4 ... ...
10-1/2 U-1/2 ... 20-1/4 22 ... .797 20.24
... V 63-3/4 ... ... 23-3/4 ... ...
11 V-1/2 ... 20-3/4 23 ... .814 20.68
... W 65 ... ... 25 ... ...
11-1/2 ... ... 21 24 ... .830 21.08
... X 66-1/4 ... ... 26-1/4 ... ...
12 Y 67-1/2 21-1/4 25 27-1/2 .846 21.49
12-1/2 Z 68-3/4 21-3/4 26 28-3/4 .862 21.89
13 ... ... 22 27 ... .879 22.33

 

Ring Size

Length in
Inches

Length in
Millimeters

Wrap a piece of paper or a string around your finger
 and mark to measure the length, then compare the
length to the chart below to determine your ring size.

3

1-11/16

42.8

3-1/2

1-3/4

44.4

4

1-13/16

46

4-1/2

1-7/8

47.6

5

1-15/16

49.2

5-1/2

2

50.8

6

2-1/16

52.4

6-1/2

2-1/8

54

7

2-3/16

55.6

7-1/2

2-1/4

57.2

8

2-5/16

58.7

8-1/2

2-3/8

60.3

9

2-7/16

61.9

9-1/2

2-1/2

63.5

10

2-9/16

65.1

10-1/2

2-5/8

66.7

11

2-11/16

68.3

11-1/2

2-3/4

69.9

12

2-13/16

71.5

12-1/2

2-7/8

73.1

13

2-15/16

74.7

 

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Laurel Ladd Ciotti
P O Box 671
McIntosh, FL 32664
Last Updated February 24, 2007.