Ring Size Equivalents

The following is a chart for conversion of various ring sizes to U.S. standard ring sizes. The "Length in inches or mm" measurements can be used to estimate your finger size:

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.
4.Compare the length to the chart below.
Note: Make sure to allow size for knuckle, but shall smaller than knuckle (otherwise the ring may fall out from finger)

While these measurements can be used as a guide, the best way to find out your exact finger size is to visit your local jeweler and ask for a free sizing. This is a common courtesy any reputable jeweler should be happy to provide

US Size

Length in inches

Length in metric mm

British

French

German

Japanese

Swiss

3

1.735

44

F

44

14

4

4

3.5

1.79

45.2

G

45  1/4

14  1/2

5

5  1/4

4

1.835

46.5

H 1/2

46  1/2

15

7

7  1/4

4.5

1.89

47.8

I 1/2

47  3/4

15  1/4

8

8  3/4

5

1.943

49

J 1/2

50

15  3/4

9

9  1/2

5.5

2

50.3

L

51  3/4

16

11

11  3/4

6

2.045

51.5

M

52  3/4

16  1/2

12

12  3/4

6.5

2.10

52.8

N

54

17

13

14

7

2.15

54

O

55  1/4

17  1/4

14

15  1/4

7.5

2.20

55.3

P

56  1/2

17  3/4

15

16  1/2

8

2.25

56.6

Q

57  3/4

18

16

17  3/4

8.5

2.30

57.8

Q 1/2

58  1/2

18  1/2

17

18  1/2

9

2.35

59.1

S

60

19

18

19  3/4

9.5

2.40

60.3

T

61  1/2

19  1/2

19

21

10

2.46

61.6

T 1/2

62  1/4

20

20

22

10.5

2.51

62.8

U 1/2

63

20  1/4

22

23  1/4

11

2.56

64.1

V 1/2

64  1/2

20  3/4

23

24

11.5

2.61

65.3

X

66  1/4

21

24

25  3/4

12

2.63

66.6

Y

67  1/2

21  1/4

25

27  1/2

12.5

2.71

67.9

Z

68  3/4

21  3/4

26

28  3/4

13

2.76

69.1

Z 1/2

70

22

27

29  1/4