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International Ring Size Standards

To help you find the perfect fit, we’ve provided a comprehensive ring size conversion chart based on internal circumference (in millimeters). This guide translates sizes across major international standards.

Finger Size (mm)	Europe	USA	UK	Japan
44	44	3	F ½	4
45	45	3 ¼	G	5
46	46	3 ¾	H	6
47	47	4	H ½	7
48	48	4 ½	I ½	8
49	49	4 ¾	J ½	9
50	50	5 ¼	K	10
51	51	5 ¾	L	11
52	52	6	L ½	12
53	53	6 ¼	M ½	13
54	54	6 ¾	N ½	14
55	55	7 ¼	O	15
56	56	7 ½	P	16
57	57	8	P ½	17
58	58	8 ¼	Q ½	18
59	59	8 ¾	R	19
60	60	9	S	20
61	61	9 ½	S ½	21
62	62	10	T ½	22
63	63	10 ¼	U ½	23
64	64	10 ¾	V	24
65	65	11	W	25
66	66	11 ½	W ½	26
67	67	11 ¾	X ½	27
68	68	12 ¼	Z	28
69	69	12 ½	Z ½	29
70	70	13	–	30
71	71	13 ¼	–	31

Please note: This size chart is intended as a reference guide. For the most accurate fit, we recommend having your ring size professionally measured.