International Ring Size Chart

Circumference	Diameter	US Canada	UK Europe Australia	Asia Hong Kong, China, Taiwan Japan, Singapore, and Macau	Switzerland	Germany	France
mm	mm	Ring Size
44.2	14.1	3	F	4	4	14	44
44.8	14.3		F 1/2	5	5 1/4
45.5	14.5	3 1/2	G			14 1/2	45 1/2
46.1	14.7		G 1/2	6	6 1/2
46.8	14.9	4	H	7
47.4	15.1		H 1/2		7 3/4	15	46 1/2
48.0	15.3	4 1/2	I	8
48.7	15.5		J		9
49.3	15.7	5	J 1/2	9		15 3/4	49
50.0	15.9		K		10
50.6	16.1	5 1/2	K 1/2	10
51.2	16.3		L		11 3/4	16	51 1/4
51.9	16.5	6	L 1/2	11	12 3/4
52.5	16.7		M	12		16 1/2	51 1/2
53.1	16.9	6 1/2	M 1/2	13	14
53.8	17.1		N			17	52 3/4
54.4	17.3	7	N 1/2	14	15 1/4	17 1/4	54
55.1	17.5		O
55.7	17.7	7 1/2	O 1/2	15	16 1/2	17 1/2	55 1/2
56.3	17.9		P
57.0	18.1	8	P 1/2	16	17 3/4	18	56 3/4
57.6	18.3		Q
58.3	18.5	8 1/2	Q 1/2	17		18 1/2	58
58.9	18.8		R		19
59.5	19.0	9	R 1/2	18		19	59 1/4
60.2	19.2		S		20 1/4
60.8	19.4	9 1/2	S 1/2	19		19 1/2	60 1/2
61.4	19.6		T		21 1/2
62.1	19.8	10	T 1/2	20		20	61 3/4
63.4	20.2	10 1/2	U 1/2	22	22 3/4	20 1/4	62 3/4
64.0	20.4		V
64.6	20.6	11	V 1/2	23		20 3/4	64 1/4
65.3	20.8		W		25
65.9	21.0	11 1/2	W 1/2	24		21	66
66.6	21.2		X
67.2	21.4	12	X 1/2	25	27 1/2
67.8	21.6		Y			21 3/4	67 1/4
68.5	21.8	21 1/2	Z	26	28 3/4
69.1	22.0		Z 1/2			22
69.7	22.2	13		27
70.4	22.4		Z + 1
71.0	22.6	13 1/2