Ring Sizing

For conversion of size from AU, NZ & UK, please refer to the below chart used by Ruah Zirachi. 

Ruah Zirachi (AU & UK, NZ)	US & Canada	Circumference (mm)	Inside Diameter (mm)
H	4	46.80	14.88
H½	4.25	47.40	15.09
I	4.5	48.00	15.29
J	4.75	48.70	15.49
J½	5	49.30	15.70
K	5.25	50.00	15.90
K½	5.5	50.60	16.10
L	5.75	51.20	16.31
L½	6	51.90	16.51
M	6.25	52.50	16.71
M½	6.5	53.10	16.92
N	6.75	53.80	17.12
N½	7	54.40	17.32
O	7.25	55.10	17.53
O½	7.5	55.70	17.73
P	7.75	56.30	17.93
P½	8	57.00	18.14
Q	8.25	57.60	18.34
Q½	8.5	58.30	18.54
R	8.75	58.90	18.75
R½	9	59.50	18.95
S	9.25	60.20	19.15
S½	9.5	60.80	19.35
T	9.75	61.40	19.56
T½	10	62.10	19.76
U	10.25	62.70	19.96
U½	10.5	63.40	20.17
V	10.75	64.00	20.37
V½	11	64.60	20.57
W	11.25	65.30	20.78
W½	11.5	65.90	20.93
X	11.75	66.60	21.18
X½	12	67.20	21.39
Y	12.25	67.80	21.59
Y½	12.5	68.50	21.79
Z	12.75	69.10	22.00
Z½	13	69.70	22.20
Z1	13.25	70.40	22.40
	13.5	71.00	22.61
Z2	13.75	71.70	22.81
Z3	14	72.30	23.01
	14.25	72.90	23.22
Z4	14.5	73.60	23.42