Global finger ring sizing guide, conversions, & measurements

USA, Canada & Mexico	UK, Ireland, Australia & New Zealand	Japan	Italy, Spain & Switz
4	H	7	6.75
4.5	I	8	8
5	J½	9	9.25
5.5	K½	10	10.5
6	L½	11	11.75
6.5	M½	13	13.25
7	N½	14	14.5
7.5	O½	15	15.75
8	P½	16	17
8.5	Q½	17	18.25
9	R½	18	19.5
9.5	S½	19	20.75
10	T½	20	22
10.5	U½	22	23.25
11	V½	23	24.75
11.5	W½	24	26
12	X½	25	27.25
12.5	Z	26	28.5
13		27	29.75
13.5			31
14	Z3		32.25
14.5	Z4		33.5
15			34.75