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Jadeite Ring Size Chart

Ring Sizes Inside Diameter Inside Circumference
AU & UK US & Canada Millimetres Inches Millimetres Inches
C 1/2 1 3/4 13.00 0.512 40.82 1.61
D 2 13.20 0.520 41.45 1.63
D 1/2 2 1/4 13.40 0.528 42.08 1.66
E 2 1/2 13.60 0.535 42.70 1.68
E 1/2 2 3/4 13.70 0.539 43.02 1.69
F 3 14.00 0.551 43.96 1.73
F 1/2 3 1/4 14.20 0.559 44.59 1.76
G 3 1/2 14.30 0.563 44.90 1.77
G 1/2 3 3/4 14.50 0.571 45.53 1.79
H 4 14.80 0.583 46.47 1.83
H 1/2 4 1/4 15.00 0.591 47.10 1.85
I 4 1/2 15.20 0.598 47.73 1.88
I 1/2 4 3/4 15.40 0.606 48.36 1.9
J 5 15.60 0.614 48.98 1.93
J 1/2 5 1/4 15.80 0.622 49.61 1.95
K 5 1/2 16.00 0.630 50.24 1.98
K 1/2 5 3/4 16.20 0.638 50.87 2.00
L 6 16.40 0.646 51.50 2.03
L 1/2 6 1/4 16.60 0.654 52.12 2.05
M 6 1/2 16.80 0.661 52.75 2.08
M 1/2 6 3/4 17.00 0.669 53.38 2.1
N 7 17.20 0.677 54.01 2.13
N 1/2 7 1/4 17.40 0.685 54.64 2.15
O 7 1/2 17.60 0.693 55.26 2.18
O 1/2 7 3/4 17.80 0.701 55.89 2.20
P 8 18.00 0.709 56.52 2.23
P 1/2 8 1/4 18.20 0.717 57.15 2.25
Q 8 1/2 18.40 0.724 57.78 2.27
Q 1/2 8 3/4 18.60 0.732 58.40 2.3
R 9 18.80 0.740 59.03 2.32
R 1/2 9 1/4 19.00 0.748 59.66 2.35
S 9 1/2 19.20 0.756 60.29 2.37
S 1/2 9 3/4 19.40 0.764 60.92 2.4
T 10 19.60 0.772 61.54 2.42
T 1/2 10 1/4 19.80 0.780 62.17 2.45
U 10 1/2 20.00 0.787 62.80 2.47
U 1/2 10 3/4 20.20 0.795 63.43 2.5
V 11 20.40 0.803 64.06 2.52
V 1/2 11 1/4 20.60 0.811 64.68 2.55
W 11 1/2 20.80 0.819 65.31 2.57
W 1/2 11 3/4 21.00 0.827 65.94 2.6
X 12 21.20 0.835 66.57 2.62
X 1/2 12 1/4 21.40 0.843 67.20 2.65
Y 12 1/2 21.60 0.850 67.82 2.67
Y 1/2 12 3/4 21.80 0.858 68.45 2.69

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