Ring Size Guide
Diameter		USA, Canada	UK, Ireland, Australia	Japan	Switzerland,
(in)	(mm)				Europe
0.586	14.9	4	H	7
0.594	15.1	4 1/4	H 1/2		7.75
0.602	15.3	4 1/2	I	8
0.61	15.5	4 3/4	J		9
0.618	15.7	5	J 1/2	9
0.626	15.9	5 1/4	K		10
0.634	16.1	5 1/2	K 1/2	10
0.642	16.3	5 3/4	L		11.75
0.65	16.5	6	L 1/2	11	12.75
0.658	16.7	6 1/4	M	12
0.666	16.9	6 1/2	M 1/2	13	14
0.674	17.1	6 3/4	N
0.682	17.3	7	N 1/2	14	15.25
0.69	17.5	7 1/4	O	15
0.698	17.7	7 1/2	O 1/2		16.5
0.706	17.9	7 3/4	P	16
0.714	18.1	8	P 1/2		17.75
0.722	18.3	8 1/4	Q	17
0.73	18.5	8 1/2	Q 1/2	18
0.738	18.8	8 3/4	R		19
0.746	19.0	9	R 1/2	19
0.754	19.2	9 1/4	S		20.25
0.762	19.4	9 1/2	S 1/2	20
0.77	19.6	9 3/4	T	21	21.5
0.778	19.8	10	T 1/2
0.786	20.0	10 1/4	U	22
0.794	20.2	10 1/2	U 1/2	23	22.75
0.802	20.4	10 3/4	V
0.81	20.6	11	V 1/2	24
0.818	20.8	11 1/4	W		25
0.826	21.0	11 1/2	W 1/2	25
0.834	21.2	11 3/4	X	26
0.842	21.4	12	X 1/2		27.5
0.85	21.6	12 1/4	Y	27
0.858	21.8	12 1/2	Z	28	28.75
0.866	22.0	12 3/4	Z 1/2
0.874	22.2	13		29
0.882	22.4	13 1/4	Z1
0.89	22.6	13 1/2		30
0.898	22.8	13 3/4	Z2	31
0.906	23.0	14	Z3
0.914	23.2	14 1/4		32
0.922	23.4	14 1/2	Z4	33
0.93	23.6	14 3/4
0.938	23.8	15