Ring Size Equivalents

Ring Size Equivalents
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INTERNATIONAL EQUIVALENTS

CDN. / U.S.	DIAMETER ( in millimeters )	U.K.	JAPANESE	CIRCUMFERENCE ( in millimeters )
4	14.8mm	H ½	7	46.5mm
4 ½	15.2mm	I ½	8	48mm
5	15.6mm	J ½	9	49mm
5 ½	16mm	L	10	50.5mm
6	16.4mm	M	12	52mm
6 ½	16.8mm	N	13	53mm
7	17.3mm	O	14	54.5mm
7 ½	17.7mm	P	15	55.5mm
8	18.1mm	Q	16	57mm
8 ½	18.5mm	Q ½	17	58mm
9	18.9mm	R ½	18	59.5mm
9 ½	19.3mm	S ½	20	61mm
10	19.7mm	T ½	21	62mm
10 ½	20.1mm	U ½	22	63.5mm
11	20.6mm	V ½	24	64.5mm
11 ½	21mm	W ½	25	66mm
12	21.4mm	Y	26	67.5mm
12 ½	21.8mm	Z	27	68.5mm
13	22.2mm	Z+1	28	70mm
13 ½	22.6mm	Z+2	29	71mm
14	23mm	Z+3	31	72.5mm
14 ½	23.4mm	Z+4	32	74mm
15	23.9mm	Z+5	33	75mm