Ring Size Conversion Chart

RING SIZE CONVERSION CHART

Inside	Inside	Inside	Inside	Number Sizes	Wheat Sheaf
Diameter	Diameter	Circumference	Circumference	US/Canada	British	Japanese	Swiss
(inches)	(mm)	(inches)	(mm)	Standard	Irish	Equivalent	Equivalent
					Australian
					Equivalent
0.458	11.6	1.438	36.5	0
0.466	11.8	1.463	37.2	¼
0.474	12.0	1.488	37.8	½	A
0.482	12.2	1.513	38.4	¾	A ½
0.490	12.4	1.539	39.1	1	B	1
0.498	12.6	1.564	39.7	1 ¼	B ½
0.506	12.9	1.589	40.4	1 ½	C
0.514	13.1	1.614	41.0	1 ¾	C ½
0.522	13.3	1.639	41.6	2	D	2	1.50
0.530	13.5	1.664	42.3	2 ¼	D ½
0.538	13.7	1.689	42.9	2 ½	E	3	2.75
0.546	13.9	1.714	43.5	2 ¾	E ½
0.554	14.1	1.740	44.2	3	F	4	4.00
0.562	14.3	1.765	44.8	3 ¼	F ½	5	5.25
0.570	14.5	1.790	45.5	3 ½	G
0.578	14.7	1.815	46.1	3 ¾	G ½	6	6.50
0.586	14.9	1.840	46.7	4	H	7
0.594	15.1	1.865	47.4	4 ¼	H ½		7.75
0.602	15.3	1.890	48.0	4 ½	I	8
0.610	15.5	1.915	48.7	4 ¾	J		9.00
0.618	15.7	1.941	49.3	5	J ½	9
0.626	15.9	1.966	49.9	5 ¼	K		10.00
0.634	16.1	1.991	50.6	5 ½	K ½	10
0.642	16.3	2.016	51.2	5 ¾	L		11.75
0.650	16.5	2.041	51.8	6	L ½	11	12.75
0.658	16.7	2.066	52.5	6 ¼	M	12
0.666	16.9	2.091	53.1	6 ½	M ½	13	14.00
0.674	17.1	2.116	53.8	6 ¾	N
0.682	17.3	2.141	54.4	7	N ½	14	15.25
0.690	17.5	2.167	55.0	7 ¼	O
0.698	17.7	2.192	55.7	7 ½	O ½	15	16.50
0.706	17.9	2.217	56.3	7 ¾	P
0.714	18.1	2.242	56.9	8	P ½	16	17.75
0.722	18.3	2.267	57.6	8 ¼	Q
0.730	18.5	2.292	58.2	8 ½	Q ½	17
0.738	18.7	2.317	58.9	8 ¾	R		19
0.746	18.9	2.342	59.5	9	R ½	18
0.754	19.2	2.368	60.1	9 ¼	S		20.25
0.762	19.4	2.393	60.8	9 ½	S ½	19
0.770	19.6	2.418	61.4	9 ¾	T		21.5
0.778	19.8	2.443	62.1	10	T ½	20
0.786	20.0	2.468	62.7	10 ¼	U	21
0.794	20.2	2.493	63.3	10 ½	U ½	22	22.75
0.802	20.4	2.518	64.0	10 ¾	V
0.810	20.6	2.543	64.6	11	V ½	23
0.818	20.8	2.569	65.2	11 ¼	W		25
0.826	21.0	2.594	65.9	11 ½	W ½	24
0.834	21.2	2.619	66.5	11 ¾	X
0.842	21.4	2.644	67.2	12	X ½	25	27.50
0.850	21.6	2.669	67.8	12 ¼	Y
0.858	21.8	2.694	68.4	12 ½	Z	26	28.75
0.866	22.0	2.719	69.1	12 ¾	Z ½
0.874	22.2	2.744	69.7	13		27
0.882	22.4	2.769	70.3	13 ¼	Z1
0.890	22.6	2.795	71.0	13 ½
0.898	22.8	2.820	71.6	13 ¾	Z2
0.906	23.0	2.845	72.3	14	Z3
0.914	23.2	2.870	72.9	14 ¼
0.922	23.4	2.895	73.5	14 ½	Z4
0.930	23.6	2.920	74.2	14 ¾
0.938	23.8	2.945	74.8	15
0.946	24.0	2.970	75.4	15 ¼
0.954	24.2	2.996	76.1	15 ½
0.962	24.4	3.021	76.7	15 ¾
0.970	24.6	3.046	77.4	16

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