International Ring Sizes

Table of International Ring Size Equivalents

We size our rings to international size equivalents. Please contact us if you are interested in ordering from outside the US.

United States Standard (Including Canada)	Average Diameter In Inches	British Equivalent	French Equivalent	German Equivalent	Japanese Equivalent	Swiss Equivalent
000	.390	-	-	-	-	-
00	.422	-	-	-	-	-
0	.454	-	-	-	-	-
1/2	-	A	-	-	-	-
3/4	-	A1/22	-	-	-	-
1	.487	B	-	-	1	-
1 1/4	-	B-1/2	-	-	-	-
1 1/2	.503	C	-	-	-	-
1 3/4	-	C-1/2	-	-	-	-
2	.520	D	41 1/2	13 1/2	2	1 1/2
2 1/4	-	D-1/2	-	-	-	-
2 1/2	.536	E	42 3/4	13 3/4	3	2 3/4
2 3/4	-	E-1/2	-	-	-	-
3	.553	F	44	14	4	4
3 1/8	-	F-1/2	-	-	-	-
3 3/8	-	G	45 1/4	-	5	5 1/4
3 1/2	.569	-	-	14 1/2	-	-
3 5/8	-	G-1/2	-	-	6	-
3 3/4	-	H	46 1/2	-	-	6 1/2
4	.585	H-1/2	-	15	7	-
4 1/4	-	I	47 3/4	-	-	7 3/4
4 1/2	.601	I-1/2	-	15 1/4	8	-
4 7/8	-	J	49	-	-	9
5	.618	J-1/2	-	15 3/4	9	-
5 1/8	-	K	50	-	-	10
5 3/8	-	K-1/2	-	-	10	-
5 1/2	.634	L	51 3/4	16	-	11 3/4
5 7/8	-	L-1/2	-	-	11	-
6	.650	M	52 3/4	16 1/2	12	12 3/4
6 1/4	-	M-1/2	-	-	-	-
6 1/2	.666	N	54	17	13	14
6 3/4	-	N-1/2		-	-	-
7	.683	O	55 1/4	17 1/4	14	15 1/4
7 1/4	-	O-1/2	-	-	-	-
7 1/2	.699	P	56 1/2	17 3/4	15	16 1/2
7 3/4	-	P-1/2	-	-	-	-
8	.716	Q	57 3/4	18	16	17 3/4
8 1/4	-	Q-1/2	-	-	-	-
8 1/2	.732	-	-	18 1/2	17	-
8 5/8	-	R	59	-	-	19
8 7/8	-	R-1/2	-	-	-	-
9	.748	-	-	19	18	-
9 1/8	-	S	60 1/4	-	-	20 1/4
9 3/8	-	S-1/2	-	-	-	-
9 1/2	.764	-	-	19 1/2	19	-
9 5/8	-	T	61 1/2	-	-	21 1/2
10	.781	T-1/2	-	20	20	-
10 1/4	-	U	62 3/4	-	21	22 3/4
10 1/2	.797	U-1/2	-	20 1/4	22	-
10 5/8	-	V	63 3/4	-	-	23 3/4
11	.814	V-1/2	-	20 3/4	23	-
11 1/8	-	W	65	-	-	25
11 3/8	-	W-1/2	-	-	-	-
11 1/2	.830	-	-	21	24	-
11 5/8	-	X	66 1/4	-	-	26 1/4
11 7/8	-	X-1/2	-	-	-	-
12	.846	Y	67 1/2	21 1/4	25	27 1/2
12 1/4	-	Y-1/2	-	-	-	-
12 1/2	.862	Z	68 3/4	21 3/4	26	28 3/4
12 3/4	-	Z-1/2	-	-	-	-
13	.879	-	-	22	27	-