Ring Sizing

size

Circumference (mm)

Diameter (mm)

J

48.7

15.5

K

50

15.9

L

51.2

16.3

M

52.5

16.7

N

53.8

17.2

O

55.1

17.5

P

56.3

17.9

Q

57.6

18.3

R

58.9

18.8

S

60.2

19.15

T

61.4

19.6

U

62.9

20