Ring Size Guide – Theonegems

Internatianl Ring Size Chart

Inside Diameter		Inside Circumference		Sizes
MM	Inches	MM	Inches	British & Australian	US & Canada	French	German	Japanese	Swiss
12.37	0.487	38.86	1.53	B	1	-	-	1	-
12.78	0.503	40.15	1.58	C	1 1/2	-	-	-	-
13.21	0.520	41.50	1.63	D	2	41 1/2	13 1/2	2	1 1/2
13.61	0.536	42.76	1.68	E	2 1/2	42 3/4	13 3/4	3	2 3/4
14.05	0.553	44.14	1.74	F	3	44	14	4	4
14.45	0.569	45.40	1.79	G 1/4	3 1/2	-	14 1/2	-	-
14.86	0.585	46.68	1.84	H 1/2	4	-	15	7	-
15.27	0.601	47.97	1.89	I 1/2	4 1/2	-	15 1/4	8	-
15.70	0.618	49.32	1.94	J 1/2	5	-	15 3/4	9	-
16.10	0.634	50.58	1.99	L	5 1/2	51 3/4	16	-	11 3/4
16.51	0.650	51.87	2.04	M	6	52 3/4	16 1/2	12	12 3/4
16.92	0.666	53.16	2.09	N	6 1/2	54	17	13	14
17.35	0.683	54.51	2.15	O	7	55 1/4	17 1/4	14	15 1/4
17.75	0.699	55.76	2.20	P	7 1/2	56 1/2	17 3/4	15	16 1/2
18.19	0.716	57.15	2.25	Q	8	57 3/4	18	16	17 3/4
18.53	0.729	58.21	2.29	Q 3/4	8 1/2	-	18 1/2	17	-
18.89	0.748	59.34	2.35	R 3/4	9	-	19	18	-
19.22	0.757	60.38	2.38	S 1/4	9 1/4	-	-	-	-
19.41	0.764	60.98	2.40	S 3/4	9 1/2	-	19 1/2	19	-
19.84	0.781	62.33	2.45	T 1/2	10	-	20	20	-
20.20	0.797	63.46	2.50	U 1/2	10 1/2	-	20 1/4	22	-
20.68	0.814	64.97	2.56	V 1/2	11	-	20 3/4	23	-
21.08	0.830	66.22	2.61	W 3/4	11 1/2	-	21	24	-
21.49	0.846	67.51	2.66	Y	12	67 1/2	21 1/4	25	27 1/2
21.89	0.862	68.77	2.71	Z	12 1/2	68 3/4	21 3/4	26	28 3/4
22.33	0.879	70.15	2.76	Z+1	13	-	22	27	-
22.60	0.890	71.00	2.80	Z+1.5	13 1/2	-	-	-	-