Ring Size Conversion Calculator

Ring Size Conversion Chart

Ring Diameter (MM)	USA/Canada	United Kingdom	Europe	Germany	Japan	Switzerland
14.0 mm	3	F	44	14	4	4
14.4 mm	3.5	G	45.25	14.5	5.5	6.33
14.8 mm	4	H.5	46.5	15	7	6.5
15.2 mm	4.5	I.5	47.75	15.25	8	8
15.6 mm	5	J.5	49	15.75	9	9.5
16.0 mm	5.5	L	50.75	16	10.5	10.75
16.5 mm	6	M	51.5	16.5	12	12.75
16.9 mm	6.5	N	52.75	17	13	14
17.3 mm	7	O	54	17.25	14	15.25
17.7 mm	7.5	P	55.25	17.75	15	16.5
18.2 mm	8	Q	56.75	18	16	17.75
18.6 mm	8.5	Q.5	58	18.5	17	18.5
19.0 mm	9	R.5	59.25	19	18	20
19.4 mm	9.5	S.5	60.75	19.5	19	21
19.8 mm	10	T.5	61.75	20	20	21.75
20.2 mm	10.5	U.5	62.75	20.75	22	22.75
20.6 mm	11	V.5	64.25	20.75	23	24
21.0 mm	11.5	W.5	66	21	24	25.75
21.4 mm	12	Y	67.25	21.25	25	27.25
21.8 mm	12.5	Z	68	21.75	26	28.75
22.2 mm	13	Z + 1	69	22	27	29.25
22.6 mm	13.5	Z + 1.5	71	22.6	28	31