Livingston Jewelers: International Ring Size Conversion Chart

International Ring Size Conversion Chart

Welcome to my page about international ring sizing standards. I have compiled the information on this page from several sources to help you determine your local ring size compared to those from other countries. The standards included in this resource are from the US & Canada, United Kingdom & Australia, France & Russia, Germany, Japan and Switzerland. Displaying sizes in both metric and imperial for the most recognised international standards, this chart will be useful for you and your clients.

International Ring Size Conversion Chart
Inside Diameter		Inside Circumference		Sizes
MM	Inches	MM	Inches	British & Australian	US & Canada	French & Russian	German	Japanese	Swiss
9.91	0.390	31.13	1.22		0000
10.72	0.442	33.68	1.39		00
11.53	0.454	36.22	1.43		0
11.95	0.474	37.54	1.49	A	1/2
12.18	0.482	38.26	1.51	A 1/2	3/4
12.37	0.487	38.86	1.53	B	1			1
12.60	0.496	39.58	1.56	B 1/2	1 1/4
12.78	0.503	40.15	1.58	C	1 1/2
13.00	0.512	40.84	1.61	C 1/2	1 3/4
13.21	0.520	41.50	1.63	D	2	41 1/2	13 1/2	2	1 1/2
13.41	0.528	42.13	1.66	D 1/2	2 1/4
13.61	0.536	42.76	1.68	E	2 1/2	42 3/4	13 3/4	3	2 3/4
13.83	0.544	43.45	1.71	E 1/2	2 3/4
14.05	0.553	44.14	1.74	F	3	44	14	4	4
14.15	0.557	44.45	1.75	F 1/2	3 1/8
14.25	0.561	44.77	1.76	F 3/4	3 1/4
14.36	0.565	45.11	1.77	G	3 3/8	45 1/4		5	5 1/4
14.45	0.569	45.40	1.79	G 1/4	3 1/2		14 1/2
14.56	0.573	45.74	1.80	G 1/2	3 5/8			6
14.65	0.577	46.02	1.81	H	3 3/4	46 1/2			6 1/2
14.86	0.585	46.68	1.84	H 1/2	4		15	7
15.04	0.592	47.25	1.86	I	4 1/4	47 3/4			7 3/4
15.27	0.601	47.97	1.89	I 1/2	4 1/2		15 1/4	8
15.40	0.606	48.38	1.90	J	4 5/8	49	15 1/2		9
15.53	0.611	48.79	1.92	J 1/4	4 3/4
15.70	0.618	49.32	1.94	J 1/2	5		15 3/4	9
15.80	0.622	49.64	1.95	K	5 1/8	50			10
15.90	0.626	49.95	1.97	K 1/4	5 1/4
16.00	0.630	50.27	1.98	K 1/2	5 3/8			10
16.10	0.634	50.58	1.99	L	5 1/2	51 3/4	16		11 3/4
16.30	0.642	51.21	2.02	L 1/4	5 3/4
16.41	0.646	51.55	2.03	L 1/2	5 7/8
16.51	0.650	51.87	2.04	M	6	52 3/4	16 1/2	12	12 3/4
16.71	0.658	52.50	2.07	M 1/2	6 1/4
16.92	0.666	53.16	2.09	N	6 1/2	54	17	13	14
17.13	0.674	53.82	2.12	N 1/2	6 3/4
17.35	0.683	54.51	2.15	O	7	55 1/4	17 1/4	14	15 1/4
17.45	0.687	54.82	2.16	O 1/2	7 1/4
17.75	0.699	55.76	2.20	P	7 1/2	56 1/2	17 3/4	15	16 1/2
17.97	0.707	56.45	2.22	P 1/2	7 3/4
18.19	0.716	57.15	2.25	Q	8	57 3/4	18	16	17 3/4
18.35	0.722	57.65	2.27	Q 1/2	8 1/4
18.53	0.729	58.21	2.29	Q 3/4	8 1/2		18 1/2	17
18.61	0.733	58.47	2.30	R	8 5/8	59			19
18.69	0.736	58.72	2.31	R 1/4	8 3/4
18.80	0.740	59.06	2.32	R 1/2	8 7/8
18.89	0.748	59.34	2.35	R 3/4	9		19	18
19.10	0.752	60.00	2.36	S	9 1/8	60 1/4			20 1/4
19.22	0.757	60.38	2.38	S 1/4	9 1/4
19.31	0.760	60.66	2.39	S 1/2	9 3/8
19.41	0.764	60.98	2.40	S 3/4	9 1/2		19 1/2	19
19.51	0.768	61.29	2.41	T	9 5/8	61 1/2			21 1/2
19.62	0.772	61.64	2.43	T 1/4	9 3/4
19.84	0.781	62.33	2.45	T 1/2	10		20	20
20.02	0.788	62.89	2.48	U	10 1/4	62 3/4		21	22 3/4
20.20	0.797	63.46	2.50	U 1/2	10 1/2		20 1/4	22
20.32	0.800	63.84	2.51	V	10 5/8	63			23 3/4
20.44	0.805	64.21	2.53	V 1/4	10 3/4
20.68	0.814	64.97	2.56	V 1/2	11		20 3/4	23
20.76	0.817	65.22	2.57	W	11 1/8	65			25
20.85	0.821	65.50	2.58	W 1/4	11 1/4
20.94	0.824	65.78	2.59	W 1/2	11 3/8
21.08	0.830	66.22	2.61	W 3/4	11 1/2		21	24
21.18	0.834	66.54	2.62	X	11 5/8	66 1/4			26 1/4
21.24	0.836	66.73	2.63	X 1/4	11 3/4
21.30	0.839	66.92	2.64	X 1/2	11 7/8
21.49	0.846	67.51	2.66	Y	12	67 1/2	21 1/4	25	27 1/2
21.69	0.854	68.14	2.68	Y 1/2	12 1/4
21.89	0.862	68.77	2.71	Z	12 1/2	68 3/4	21 3/4	26	28 3/4
22.10	0.870	69.43	2.73	Z +1/2	12 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	13.5
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

Livingston Jewelers International Ring Size Conversion Chart

International Ring Size Conversion Chart

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