Conversion · India to United States

Indian to US / Canada ring sizes.

Indian 16 = US / Canada 7½ 17.54 mm across · 55.1 mm around

Both scales describe the same physical ring. The table below converts every size in the range, derived from inner circumference rather than copied.

Indian	US / Canada	Diameter	Circumference
1	outside range	13.30 mm	41.8 mm
2	outside range	13.58 mm	42.7 mm
3	3	13.87 mm	43.6 mm
4	3	14.15 mm	44.4 mm
5	3½	14.43 mm	45.3 mm
6	4	14.71 mm	46.2 mm
7	4	15.00 mm	47.1 mm
8	4½	15.28 mm	48.0 mm
9	5	15.56 mm	48.9 mm
10	5	15.84 mm	49.8 mm
11	5½	16.13 mm	50.7 mm
12	6	16.41 mm	51.5 mm
13	6½	16.69 mm	52.4 mm
14	6½	16.97 mm	53.3 mm
15	7	17.26 mm	54.2 mm
16	7½	17.54 mm	55.1 mm
17	7½	17.82 mm	56.0 mm
18	8	18.10 mm	56.9 mm
19	8½	18.39 mm	57.8 mm
20	8½	18.67 mm	58.6 mm
21	9	18.95 mm	59.5 mm
22	9½	19.23 mm	60.4 mm
23	9½	19.52 mm	61.3 mm
24	10	19.80 mm	62.2 mm
25	10½	20.08 mm	63.1 mm
26	11	20.36 mm	64.0 mm
27	11	20.65 mm	64.9 mm
28	11½	20.93 mm	65.8 mm
29	12	21.21 mm	66.6 mm
30	12	21.49 mm	67.5 mm

Measure in the evening — fingers swell through the day and in heat — and let your jeweller's own chart take precedence over this one. How to measure at home →