India · 30 sizes

Indian Ring Size Chart.

Numeric scale, typically 1 to 30. The most common system across Indian jewellers.

Every row is computed from inner circumference, so the diameter and the equivalents in other systems are consistent all the way down.

Indian	Diameter	Circumference	US / Canada	EU / ISO 8653	UK / Australia	Japan / China	Swiss
1	13.30 mm	41.8 mm	—	—	D½	2	2
2	13.58 mm	42.7 mm	—	—	E½	3	3
3	13.87 mm	43.6 mm	3	44	F	4	4
4	14.15 mm	44.4 mm	3	44	G	5	4
5	14.43 mm	45.3 mm	3½	45	G½	6	5
6	14.71 mm	46.2 mm	4	46	H	7	6
7	15.00 mm	47.1 mm	4	47	I	8	7
8	15.28 mm	48.0 mm	4½	48	I½	9	8
9	15.56 mm	48.9 mm	5	49	J	10	9
10	15.84 mm	49.8 mm	5	50	K	11	10
11	16.13 mm	50.7 mm	5½	51	K½	12	11
12	16.41 mm	51.5 mm	6	52	L½	13	12
13	16.69 mm	52.4 mm	6½	52	M	14	12
14	16.97 mm	53.3 mm	6½	53	M½	15	13
15	17.26 mm	54.2 mm	7	54	N½	16	14
16	17.54 mm	55.1 mm	7½	55	O	17	15
17	17.82 mm	56.0 mm	7½	56	P	18	16
18	18.10 mm	56.9 mm	8	57	P½	19	17
19	18.39 mm	57.8 mm	8½	58	Q	19	18
20	18.67 mm	58.6 mm	8½	59	R	20	19
21	18.95 mm	59.5 mm	9	60	R½	21	20
22	19.23 mm	60.4 mm	9½	60	S½	22	20
23	19.52 mm	61.3 mm	9½	61	T	23	21
24	19.80 mm	62.2 mm	10	62	T½	24	22
25	20.08 mm	63.1 mm	10½	63	U½	25	23
26	20.36 mm	64.0 mm	11	64	V	26	24
27	20.65 mm	64.9 mm	11	65	V½	27	25
28	20.93 mm	65.8 mm	11½	66	W½	—	26
29	21.21 mm	66.6 mm	12	67	X	—	27
30	21.49 mm	67.5 mm	12	68	Y	—	—

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A jeweller's own chart takes precedence over this one — makers differ by a fraction of a size and a proper mandrel beats a paper strip. Fingers also swell through the day and in heat, so measure in the evening. How to measure at home →