Ring Size Conversion Chart

FAMILY-OWNED

Inside Circumference		Inside Diameter	US & Canada	Europe	UK & Australia	Japan & Singapore
IN	MM	MM	US & Canada	Europe	UK & Australia	Japan & Singapore
1.74	44.3	14.1	3	44	F 1/2	4
1.77	44.9	14.3	3.25	45	G	5
1.79	45.6	14.5	3.5		G 1/2
1.82	46.2	14.7	3.75	46	H	6
1.84	46.8	14.9	4	47	H 1/2	7
1.87	47.4	15.1	4.25		I
1.89	48.1	15.3	4.5	48	I 1/2	8
1.92	48.7	15.5	4.75		J
1.94	49.3	15.7	5	49	J 1/2	9
1.97	50.0	15.9	5.25	50	K
1.99	50.6	16.1	5.5		K 1/2	10
2.02	51.2	16.3	5.75	51	L
2.04	51.8	16.5	6	52	L 1/2	11
2.07	52.5	16.7	6.25		M	12
2.09	53.1	16.9	6.5	53	M 1/2	13
2.12	53.7	17.1	6.75		N
2.14	54.3	17.3	7	54	N 1/2	14
2.16	55.0	17.5	7.25	55	O
2.19	55.6	17.7	7.5		O 1/2	15
2.21	56.2	17.9	7.75	56	P
2.24	56.9	18.1	8	57	P 1/2	16
2.26	57.5	18.3	8.25		Q
2.29	58.1	18.5	8.5	58	Q 1/2	17
2.33	59.1	18.8	8.75	59	R
2.35	59.7	19	9		R 1/2	18
2.37	60.3	19.2	9.25	60	S
2.40	60.9	19.4	9.5	61	S 1/2	19
2.42	61.6	19.6	9.75		T
2.45	62.2	19.8	10	62	T 1/2	20
2.47	62.8	20	10.25		U	21
2.50	63.5	20.2	10.5	63	U 1/2	22
2.52	64.1	20.4	10.75	64	V
2.55	64.7	20.6	11		V 1/2	23
2.57	65.3	20.8	11.25	65	W
2.60	66.0	21	11.5	66	W 1/2	24
2.62	66.6	21.2	11.75		X
2.65	67.2	21.4	12	67	X 1/2	25
2.67	67.9	21.6	12.25		Y
2.70	68.5	21.8	12.5	68	Z	26
2.72	69.1	22	12.75	69	Z 1/2
2.75	69.7	22.2	13	70		27
2.77	70.4	22.4	13.25		Z+1
2.80	71.0	22.6	13.5		Z+2