International Ring Size Chart

Circumference (mm) Diameter (mm) (Most EU countries, including Germany and France)		United States and Canada	UK, Europe, and Australia	Asia (Indonesia, China, Singapore, Taiwan, Japan and Macau)
44.2	14.1	3	F	4
44.8	14.3		F½	5
45.5	14.5	3½	G
46.1	14.7		G½	6
46.8	14.9	4	H	7
47.4	15.1		H½
48.0	15.3	4½	I	8
48.7	15.5		J
49.3	15.7	5	J½	9
50.0	15.9		K
50.6	16.1	5½	K½	10
51.2	16.3		L
51.9	16.5	6	L½	11
52.5	16.7		M	12
53.1	16.9	6½	M½	13
53.8	17.1		N
54.4	17.3	7	N½	14
55.1	17.5		O
55.7	17.7	7½	O½	15
56.3	17.9		P
57.0	18.1	8	P½	16
57.6	18.3		Q
58.3	18.5	8½	Q½	17
58.9	18.8		R
59.5	19.0	9	R½	18
60.2	19.2		S
60.8	19.4	9½	S½	19
61.4	19.6		T
62.1	19.8	10	T½	20
62.7	20.0		U	21
63.4	20.2	10½	U½	22
64.0	20.4		V
64.6	20.6	11	V½	23
65.3	20.8		W
65.9	21.0	11½	W½	24
66.6	21.2		X
67.2	21.4	12	X½	25
67.8	21.6		Y
68.5	21.8	12½	Z	26
69.1	22.0		Z½
69.7	22.2	13		27
70.4	22.4		Z+1
71.0	22.6	13½