Ring Size

India Size	US Size	UK Size	EU Size	Diameter (mm)	Circumference (mm)
1	1.75	C½	41	13.10	41.01
2	2.25	D	43	13.30	42.70
3	2.5	E	43	13.70	42.90
4	2.75	E½	44	13.90	43.60
5	3.5	F½	45	14.30	44.80
6	3.75	G½	46	14.70	46.10
7	4.25	H½	47	15.10	47.40
8	4.5	I	48	15.30	48.00
9	4.75	J	49	15.50	48.70
10	5.25	K	50	15.90	50.00
11	5.75	L	51	16.30	51.20
12	6	L½	52	16.50	51.90
13	6.5	M½	53	16.90	53.10
14	7	N½	54	17.30	54.40
15	7.25	O	55	17.50	55.10
16	7.5	P	56	17.90	56.30
17	8	P½	57	18.10	57.00
18	8.5	Q½	58	18.50	58.30
19	8.75	R	59	18.80	58.90
20	9	S	60	19.20	60.20
21	9.5	S½	61	19.40	60.80
22	10	T½	62	19.80	62.10
23	10.25	U	63	20.00	62.70
24	10.75	V	64	20.40	64.00
25	11	V½	65	20.60	64.60
26	11.5	W½	66	21.00	65.90
27	11.75	X½	67	21.10	67.20
28	12	Y	68	21.60	67.80
29	12.5	Z½	69	22.00	69.10
30	13	Z+1	71	22.30	71.00