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Intrenational Ring Size Conversion Chart

Inside Diameter	Inside Circumference	Sizes

Metric	French/Japanese	English	American	American	Metric	French/Japanese	English	American	American
MM	Inches	MM	IDYOURS	UK Australia South Africa	US Canada	France	Germany Russia Ukraine Asia	India China Japan South America Turkey Israel	Italy Spain Netherlands Switzerland
9.91	0.39	31.13	-	-	0	-	-	-	-
10.72	0.442	33.68	-	-	0	-	-	-	-
11.53	0.454	36.22	-	-	0	-	-	-	-
11.95	0.474	37.54	0	A	1/2	-	-	-	-
12.18	0.482	38.26	-	A 1/2	3/4	-	-	-	-
12.3	0.484	-	-	-	-	-	-	-	-
12.37	0.487	38.86	1	B	1	-	-	1	-
12.6	0.496	39.58	-	B 1/2	1 1/4	-	-	-	-
12.78	0.503	40.15	-	C	1 1/2	-	-	-	-
12.9	0.508	-	2	-	-	-	-	-	-
13	0.512	40.84	-	C 1/2	1 3/4	-	-	-	-
13.21	0.52	41.5	-	D	2	41 1/2	13 1/2	2	1 1/2
13.3	0.524	-	-	-	-	-	-	-	-
13.41	0.528	42.13	3	D 1/2	2 1/4	-	-	-	-
13.61	0.536	42.76	-	E	2 1/2	42 3/4	13 3/4	3	2 3/4
13.7	0.539	-	-	-	-	-	-	-	-
13.83	0.544	43.45	4	E 1/2	2 3/4	-	-	-	-
14.05	0.553	44.14	-	F	3	44	14	4	4
14.1	0.555	-	-	-	-	-	-	-	-
14.15	0.557	44.45	-	F 1/2	3 1/8	-	-	-	-
14.25	0.561	44.77	-	F 3/4	3 1/4	-	-	-	-
14.36	0.565	45.11	-	G	3 3/8	45 1/4	-	5	5 1/4
14.4	0.567	-	5	-	-	-	-	-	-
14.45	0.569	45.4	-	G 1/4	3 1/2	-	14 1/2	-	-
14.56	0.573	45.74	-	G 1/2	3 5/8	-	-	6	-
14.65	0.577	46.02	-	H	3 3/4	46 1/2	-	-	6 1/2
14.8	0.582	-	-	-	-	-	-	-	-
14.86	0.585	46.68	6	H 1/2	4	-	15	7	-
15.04	0.592	47.25	-	I	4 1/4	47 3/4	-	-	7 3/4
15.1	0.594	-	-	-	-	-	-	-	-
15.27	0.601	47.97	-	I 1/2	4 1/2	-	15 1/4	8	-
15.4	0.606	48.38	7	J	4 5/8	49	15 1/2	-	9
15.53	0.611	48.79	-	J 1/4	4 3/4	-	-	-	-
15.7	0.618	49.32	-	J 1/2	5	-	15 3/4	9	-
15.8	0.622	49.64	-	K	5 1/8	50	-	-	10
15.9	0.626	49.95	8	K 1/4	5 1/4	-	-	-	-
16	0.63	50.27	-	K 1/2	5 3/8	-	-	10	-
16.1	0.634	50.58	-	L	5 1/2	51 3/4	16	-	11 3/4
16.3	0.642	51.21	-	L 1/4	5 3/4	-	-	-	-
16.41	0.646	51.55	9	L 1/2	5 7/8	-	-	-	-
16.51	0.65	51.87	-	M	6	52 3/4	16 1/2	12	12 3/4
16.71	0.658	52.5	-	M 1/2	6 1/4	-	-	-	-
16.92	0.666	53.16	10	N	6 1/2	54	17	13	14
17.13	0.674	53.82	-	N 1/2	6 3/4	-	-	-	-
17.2	0.677	-	-	-	-	-	-	-	-
17.35	0.683	54.51	-	O	7	55 1/4	17 1/4	14	15 1/4
17.45	0.687	54.82	11	O 1/2	7 1/4	-	-	-	-
17.6	0.692	-	-	-	-	-	-	-	-
17.75	0.699	55.76	-	P	7 1/2	56 1/2	17 3/4	15	16 1/2
17.9	0.705	-	-	-	-	-	-	-	-
17.97	0.707	56.45	12	P 1/2	7 3/4	-	-	-	-
18.19	0.716	57.15	-	Q	8	57 3/4	18	16	17 3/4
18.3	0.72	-	-	-	-	-	-	-	-
18.35	0.722	57.65	13	Q 1/2	8 1/4	-	-	-	-
18.53	0.729	58.21	-	Q 3/4	8 1/2	-	18 1/2	17	-
18.61	0.733	58.47	-	R	8 5/8	59	-	-	19
18.69	0.736	58.72	-	R 1/4	8 3/4	-	-	-	-
18.8	0.74	59.06	-	R 1/2	8 7/8	-	-	-	-
18.89	0.748	59.34	14	R 3/4	9	-	19	18	-
19	0.748	-	-	-	-	-	-	-	-
19.1	0.752	60	-	S	9 1/8	60 1/4	-	-	20 1/4
19.22	0.757	60.38	-	S 1/4	9 1/4	-	-	-	-
19.31	0.76	60.66	-	S 1/2	9 3/8	-	-	-	-
19.41	0.764	60.98	15	S 3/4	9 1/2	-	19 1/2	19	-
19.51	0.768	61.29	-	T	9 5/8	61 1/2	-	-	21 1/2
19.62	0.772	61.64	-	T 1/4	9 3/4	-	-	-	-
19.84	0.781	62.33	-	T 1/2	10	-	20	20	-
19.9	0.783	-	16	-	-	-	-	-	-
20.02	0.788	62.89	-	U	10 1/4	62 3/4	-	21	22 3/4
20.2	0.797	63.46	-	U 1/2	10 1/2	-	20 1/4	22	-
20.32	0.8	63.84	-	V	10 5/8	63	-	-	23 3/4
20.44	0.805	64.21	17	V 1/4	10 3/4	-	-	-	-
20.68	0.814	64.97	-	V 1/2	11	-	20 3/4	23	-
20.76	0.817	65.22	-	W	11 1/8	65	-	-	25
20.85	0.821	65.5	-	W 1/4	11 1/4	-	-	-	-
20.94	0.824	65.78	18	W 1/2	11 3/8	-	-	-	-
21	0.827	-	-	-	-	-	-	-	-
21.08	0.83	66.22	-	W 3/4	11 1/2	-	21	24	-
21.18	0.834	66.54	-	X	11 5/8	66 1/4	-	-	26 1/4
21.24	0.836	66.73	-	X 1/4	11 3/4	-	-	-	-
21.3	0.839	66.92	-	X 1/2	11 7/8	-	-	-	-
21.49	0.846	67.51	19	Y	12	67 1/2	21 1/4	25	27 1/2
21.6	0.85	-	-	-	-	-	-	-	-
21.69	0.854	68.14	-	Y 1/2	12 1/4	-	-	-	-
21.89	0.862	68.77	20	Z	12 1/2	68 3/4	21 3/4	26	28 3/4
22.1	0.87	69.43	-	Z +1/2	12 3/4	-	-	-	-
22.33	0.879	70.15	21	Z+1	13	-	22	27	-
22.6	0.89	71	-	Z+1.5	13.5	-	-	-	-
22.69	0.893	71.28	-	Z+2	-	-	-	-	-
22.92	0.902	72	22	Z+2.5	-	-	-	-	-
23.06	0.908	72.45	-	Z+3	-	-	-	-	-
23.1	0.909	-	-	-	-	-	-	-	-
23.24	0.915	73.01	-	Z+3.5	-	-	-	-	-
23.47	0.924	73.73	23	Z+4	-	-	-	-	-
23.55	0.927	73.98	-	Z+4.5	-	-	-	-	-
23.87	0.94	74.99	24	Z+5	-	-	-	-	-
24.27	0.956	76.25	25	Z+6	-	-	-	-	-

Brand	ID-YOURS.
Color	Gold, Rose Gold, White Gold
Material	Silver / Gold / Aluminum Alloy
Weight	10 g – 20 g
Dimension	Please Refer To Size Guide

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Intrenational Ring Size Conversion Chart