Ring Size

AUSTRALIA/UK	ITALY	USA	EUROPEAN (circumference mm)
H	7	3 3/4	47
H 1/2	7.5	4	47.5
I	8	4 1/4	48
I 1/2	8.5	4 1/2	48.5
J	9	4 3/4	49
J 1/2	9.5	5	50
K	10	5 1/4	50.5
K 1/2	11	5 1/2	51
L	11.5	5 3/4	52
L 1/2	12	6	52.5
M	13	6 1/4	53
M 1/2	13.5	6 1/2	53.5
N	14	6 3/4	54
N 1/2	14.5	7	55
O	15	7 1/4	55.5
O 1/2	16	7 1/2	56
P	16.5	7 3/4	57
P 1/2	17	8	57.5
Q	18	8 1/4	58
Q 1/2	18.5	8 1/2	58.5
R	19	8 3/4	59
R 1/2	19.5	9	60
S	20	9 1/4	60.5
S 1/2	21	9 1/2	61
T	21.5	9 3/4	62
T 1/2	22	10	62.5
U	23	10 1/4	63
U 1/2	23.5	10 1/2	64
V	24	10 3/4	64.5
V 1/2	24.5	11	65
W	25.5	11 1/4	65.5
W 1/2	26	11 1/2	66
X	26.5	11 3/4	67
X 1/2	27.5	12	67.5
Y	28	12 1/4	68
Y 1/2	28.5	12 1/2	68.5
Z	29	12 3/4	69
Z + 1	30.5	13 1/4	70.5
Z + 2	31.5	13 3/4	71.5