Ring Size Chart

 

Sizes Diameter Inside Circumference
 Australian & British  US & Canada French & Russian German Japanese Swiss MM Inches MM. Inches.
A 1/2 11.95 0.474 37.54 1.49
A 1/2 3/4 12.18 0.482 38.26 1.51
B 1 1 12.37 0.487 38.86 1.53
B 1/2 1 1/4 12.6 0.496 39.58 1.56
C 1 1/2 12.78 0.503 40.15 1.58
C 1/2 1 3/4 13 0.512 40.84 1.61
D 2 41 1/2 13 1/2 2 1 1/2 13.21 0.52 41.5 1.63
D 1/2 2 1/4 13.41 0.528 42.13 1.66
E 2 1/2 42 3/4 13 3/4 3 2 3/4 13.61 0.536 42.76 1.68
E 1/2 2 3/4 13.83 0.544 43.45 1.71
F 3 44 14 4 4 14.05 0.553 44.14 1.74
F 1/2 3 1/8 14.15 0.557 44.45 1.75
G 3 3/8 45 1/4 5 5 1/4 14.36 0.565 45.11 1.77
G 1/2 3 5/8 6 14.56 0.573 45.74 1.8
H 3 3/4 46 1/2 6 1/2 14.65 0.577 46.02 1.81
H 1/2 4 15 7 14.86 0.585 46.68 1.84
I 4 1/4 47 3/4 7 3/4 15.04 0.592 47.25 1.86
I 1/2 4 1/2 15 1/4 8 15.27 0.601 47.97 1.89
J 4 5/8 49 15 1/2 9 15.4 0.606 48.38 1.9
J 1/2 5 15 3/4 9 15.7 0.618 49.32 1.94
K 5 1/8 50 10 15.8 0.622 49.64 1.95
K 1/2 5 3/8 10 16 0.63 50.27 1.98
L 5 1/2 51 3/4 16 11 3/4 16.1 0.634 50.58 1.99
L 1/2 5 7/8 16.41 0.646 51.55 2.03
M 6 52 3/4 16 1/2 12 12 3/4 16.51 0.65 51.87 2.04
M 1/2 6 1/4 16.71 0.658 52.5 2.07
N 6 1/2 54 17 13 14 16.92 0.666 53.16 2.09
N 1/2 6 3/4 17.13 0.674 53.82 2.12
O 7 55 1/4 17 1/4 14 15 1/4 17.35 0.683 54.51 2.15
O 1/2 7 1/4 17.45 0.687 54.82 2.16
P 7 1/2 56 1/2 17 3/4 15 16 1/2 17.75 0.699 55.76 2.2
P 1/2 7 3/4 17.97 0.707 56.45 2.22
Q 8 57 3/4 18 16 17 3/4 18.19 0.716 57.15 2.25
Q 1/2 8 1/4 18.35 0.722 57.65 2.27
R 8 5/8 59 19 18.61 0.733 58.47 2.3
R 1/2 8 7/8 18.8 0.74 59.06 2.32
S 9 1/8 60 1/4 20 1/4 19.1 0.752 60 2.36
S 1/2 9 3/8 19.31 0.76 60.66 2.39
T 9 5/8 61 1/2 21 1/2 19.51 0.768 61.29 2.41
T 1/2 10 20 20 19.84 0.781 62.33 2.45
U 10 1/4 62 3/4 21 22 3/4 20.02 0.788 62.89 2.48
U 1/2 10 1/2 20 1/4 22 20.2 0.797 63.46 2.5
V 10 5/8 63 23 3/4 20.32 0.8 63.84 2.51
V 1/2 11 20 3/4 23 20.68 0.814 64.97 2.56
W 11 1/8 65 25 20.76 0.817 65.22 2.57
W 1/2 11 3/8 20.94 0.824 65.78 2.59
X 11 5/8 66 1/4 26 1/4 21.18 0.834 66.54 2.62
X 1/2 11 7/8 21.3 0.839 66.92 2.64
Y 12 67 1/2 21 1/4 25 27 1/2 21.49 0.846 67.51 2.66
Y 1/2 12 1/4 21.69 0.854 68.14 2.68
Z 12 1/2 68 3/4 21 3/4 26 28 3/4 21.89 0.862 68.77 2.71
Z 1/2 12 3/4 22.1 0.87 69.43 2.73