Ring Size Chart – INTENEBRIS

International Ring Size Chart

Inside Diameter		Inside Circumference		Sizes
MM	Inches	MM	Inches	US & Canada	British & Australian	German	Japanese
12.37	0.487	38.86	1.53	1	B	–	1
12.78	0.503	40.15	1.58	1 1/2	C	–	–
13.21	0.520	41.50	1.63	2	D	13 1/2	2
13.61	0.536	42.76	1.68	2 1/2	E	13 3/4	3
14.05	0.553	44.14	1.74	3	F	14	4
14.45	0.569	45.40	1.79	3 1/2	G 1/4	14 1/2	–
14.86	0.585	46.68	1.84	4	–	15	7
15.27	0.601	47.97	1.89	4 1/2	I 1/2	15 1/4	8
15.70	0.618	49.32	1.94	5	J 1/2	15 3/4	9
16.10	0.634	50.58	1.99	5 1/2	L	16	–
16.51	0.650	51.87	2.04	6	M	16 1/2	12
16.92	0.666	53.16	2.09	6 1/2	N	17	13
17.35	0.683	54.51	2.15	7	O	17 1/4	14
17.75	0.699	55.76	2.20	7 1/2	P	17 3/4	15
18.19	0.716	57.15	2.25	8	Q	18	16
18.53	0.729	58.21	2.29	8 1/2	Q 3/4	18 1/2	17
18.89	0.748	59.34	2.35	9	R 3/4	19	18
19.41	0.764	60.98	2.40	9 1/2	S 3/4	19 1/2	19
19.84	0.781	62.33	2.45	10	T 1/2	20	20
20.20	0.797	63.46	2.50	10 1/2	U 1/2	20 1/4	22
20.68	0.814	64.97	2.56	11	V 1/2	20 3/4	23
21.08	0.830	66.22	2.61	11 1/2	W 3/4	21	24
21.49	0.846	67.51	2.66	12	Y	21 1/4	25
21.89	0.862	68.77	2.71	12 1/2	Z	21 3/4	26
22.33	0.879	70.15	2.76	13	Z+1	22	27
22.60	0.890	71.00	2.80	13 1/2	Z+1.5	–	–
22.69	0.893	71.28	2.81	–	Z+2	–	–
22.92	0.902	72.00	2.83	–	Z+2.5	–	–
23.06	0.908	72.45	2.85	–	Z+3	–	–
23.24	0.915	73.01	2.87	–	Z+3.5	–	–
23.47	0.924	73.73	2.90	–	Z+4	–	–
23.55	0.927	73.98	2.91	–	Z+4.5	–	–
23.87	0.940	74.99	2.95	–	Z+5	–	–
24.27	0.956	76.25	3.00	–	Z+6	–	–