Mystery Box - small

UK ring sizes

Inside diameter (mm)

Inside circumference (mm)

A

11.95

37.54

B

12.37

38.86

C

12.78

40.15

D

13.21

41.50

E

13.61

42.76

F

14.05

44.14

G

14.36

45.11

H

14.65

46.02

I

15.04

47.25

J

15.40

48.38

K

15.80

49.64

L

16.10

50.58

M

16.51

51.87

N

16.92

53.16

O

17.35

54.51

P

17.75

55.76

Q

18.19

57.15

R

18.61

58.47

S

19.10

60.00

T

19.51

61.29

U

20.02

62.89

V

20.32

63.84

W

20.76

65.22

X

21.18

66.54

Y

21.49

67.51

Z

21.89

68.77