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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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