International Ring Conversion Chart

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Online Conversion - Ring Size Conversion

Welcome to
Bella Couture®'s International Ring Size Conversion Chart

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Convert your ring size to the ring size used in other countries.

USA size	Diam. inch.	Diam. mm	Circum. mm

British	French	German	Japanese	Swiss

Select a ring size in one category, the rest will change to match.

How to determine your ring size

Wrap a piece of string or a strip of paper around your finger.
Mark the point where the two ends meet.
Measure the string or paper against a ruler to get the circumference of your finger.
Divide that by 3.14 to get the diameter of your finger.
Look up your ring size using the form above.

US Size	Dia. -inch	Dia. in MM	Metric -MM	British	French	German	Japanese	Swiss
0000	.390	9.91		-
00	.422	10.72		-
0	.454	11.53		-
1/2	.474	11.95		A
3/4	.482	12.18		A 1/2
1	.487	12.37	38.9	B			1
1 1/4	-	12.60	39.6	B 1/2
1 1/2	.503	12.78	40.2	C
1 3/4	-	13.00	40.8	C 1/2
2	.520	13.21	41.5	D	41 1/2	13 1/2	2	1 1/2
2 1/4	-	13.41	42.1	D 1/2	-	-
2 1/2	.536	13.61	42.7	E	42 3/4	13 3/4	3	2 3/4
2 3/4	-	13.83	43.4	E 1/2	-	-
3	.553	14.05	44.0	F	44	14	4	4
3 1/8	-	14.15	44.3	F 1/2	-	-
3 1/4	-	14.25	44.6	-	-	-
3 3/8	-	14.36	44.9	G	45 1/4	-	5	5 1/4
3 1/2	.569	14.45	45.2	-	-	14 1/2
3 5/8	-	14.56	45.6	G 1/2	-		6
3 3/4	-	14.65	45.9	H	46 1/2			6 1/2
4	.585	14.86	46.5	H 1/2	-	15	7
4 1/4	-	15.04	47.1	I	47 3/4			7 3/4
4 1/2	.601	15.27	47.8	I 1/2	-	15 1/4	8
4 5/8	-	15.40	48.1	J	49	15 1/2		9
4 3/4	-	15.53	48.4	-	-
5	.618	15.70	49.0	J 1/2	-	15 3/4	9
5 1/8	-	15.80	49.3	K	50			10
5 1/4	-	15.90	49.6	-	-
5 3/8	-	16.0	50.0	K 1/2	-		10
5 1/2	.634	16.10	50.3	L	51 3/4	16		11 3/4
5 3/4	-	16.30	50.9	-	-
5 7/8	-	16.41	51.3	L 1/2	-
6	.650	16.51	51.5	M	52 3/4	16 1/2	12	12 3/4
6 1/4	-	16.71	52.2	M 1/2	-
6 1/2	.666	16.92	52.8	N	54	17	13	14
6 3/4	-	17.13	53.4	N 1/2	-
7	.683	17.35	54.0	O	55 1/4	17 1/4	14	15 1/4
7 1/4	-	17.45	54.7	O 1/2	-
7 1/2	.699	17.75	55.3	P	56 1/2	17 3/4	15	16 1/2
7 3/4	-	17.97	55.9	P 1/2	-
8	.716	18.19	56.6	Q	57 3/4	18	16	17 3/4
8 1/4	-	18.35	57.2	Q 1/2	-
8 1/2	.732	18.53	57.8	-	-	18 1/2	17
8 5/8	-	18.61	58.4	R	59			19
8 3/4	-	18.69	58.4	-	-
8 7/8	-	18.80	59.0	R 1/2	-
9	.748	18.89	59.1	-	-	19	18
9 1/8	-	19.10	59.4	S	60 1/4			20 1/4
9 1/4	-	19.22	59.7	-	-
9 3/8	-	19.31	60.0	S 1/2	-
9 1/2	.764	19.41	60.3	-	-	19 1/2	19
9 5/8	-	19.51	60.6	T	61 1/2			21 1/2
9 3/4	-	19.62	60.9	-	-
10	.781	19.84	61.6	T 1/2	-	20	20
10 1/4	-	20.02	62.2	U	62 3/4		21	22 3/4
10 1/2	.797	20.20	62.8	U 1/2	-	20 1/4	22
10 5/8	-	20.32	63.1	V	63			23 3/4
10 3/4	-	20.44	63.5	-	-
11	.814	20.68	64.1	V 1/2	-	20 3/4	23
11 1/8	-	20.76	64.3	W	65			25
11 1/4	-	20.85	64.7	-	-
11 3/8	-	20.94	65.0	W 1/2	-
11 1/2	-	21.08	65.3	-	-	21	24
11 5/8	.830	21.18	65.7	X	66 1/4			26 1/4
11 3/4	-	21.24	66.0	-	-
11 7/8	-	21.30	66.3	X 1/2	-
12	.846	21.49	66.6	Y	67 1/2	21 1/4	25	27 1/2
12 1/4	-	21.69	67.2	Y 1/2	-
12 1/2	.862	21.89	67.9	Z	68 3/4	21 3/4	26	28 3/4
12 3/4	-	22.10	68.5	Z 1/2	-
13	.879	22.33	69.1	-	-	22	27