Ring Size Conversion

Inside
Diameter MM

Inside
Diameter Inches

USA/ Canada/
Mexico Ring Size

UK/ Ireland/ Australia/
New Zealand/ South Africa
Ring Size

Germany/ France
Ring Size

Spain/ Italy
Ring Size

Japan/ China/ India/ South America
Ring Size

15 mm

0.59"

4

H

46.8

6,5

7

15.3 mm

0.60"

4.5

I

48

8

8

15.6 mm

0.62"

5

J

49.3

9,5

9

16.2 mm

0.63"

5.5

K

50.6

10,5

10

16.6 mm

0.65"

6

L

51.9

12

11

16.9 mm

0.67"

6.5

M

53.1

13,5

13

17.2 mm

0.68"

7

N

54.4

14,5

14

17.8 mm

0.70"

7.5

O

55.7

16

15

18.1 mm

0.71"

8

P

57

17

16

18.5 mm

0.73"

8.5

Q

58.3

18,5

17

19.1 mm

0.75"

9

R

59.5

20

18

19.4 mm

0.76"

9.5

S

60.8

21

19

19.7 mm

0.78"

10

T

62.1

22,5

20

20.4 mm

0.79"

10.5

U

63.4

23,5

22

20.7 mm

0.81"

11

V

64.6

25

23

21.0 mm

0.83"

11.5

W

65.9

26

24

21.6 mm

0.84"

12

X

67.2

27,5

25

22.0 mm

0.86"

12.5

Y

68.5

29

26

22.3 mm

0.87"

13

Z

69.7

30

27

22.9 mm

0.89"

13.5

Z+2

71

32

-

23.2 mm

0.91"

14

Z+3

72.3

33

-

23.6 mm

0.92"

14.5

Z+4

73.6

34,5

-

24.0 mm

0.94"

15

Z+5

74.8

35

-