Conversion · India to United Kingdom

Indian to UK / Australia ring sizes.

Indian 16 = UK / Australia O 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	UK / Australia	Diameter	Circumference
1	D½	13.30 mm	41.8 mm
2	E½	13.58 mm	42.7 mm
3	F	13.87 mm	43.6 mm
4	G	14.15 mm	44.4 mm
5	G½	14.43 mm	45.3 mm
6	H	14.71 mm	46.2 mm
7	I	15.00 mm	47.1 mm
8	I½	15.28 mm	48.0 mm
9	J	15.56 mm	48.9 mm
10	K	15.84 mm	49.8 mm
11	K½	16.13 mm	50.7 mm
12	L½	16.41 mm	51.5 mm
13	M	16.69 mm	52.4 mm
14	M½	16.97 mm	53.3 mm
15	N½	17.26 mm	54.2 mm
16	O	17.54 mm	55.1 mm
17	P	17.82 mm	56.0 mm
18	P½	18.10 mm	56.9 mm
19	Q	18.39 mm	57.8 mm
20	R	18.67 mm	58.6 mm
21	R½	18.95 mm	59.5 mm
22	S½	19.23 mm	60.4 mm
23	T	19.52 mm	61.3 mm
24	T½	19.80 mm	62.2 mm
25	U½	20.08 mm	63.1 mm
26	V	20.36 mm	64.0 mm
27	V½	20.65 mm	64.9 mm
28	W½	20.93 mm	65.8 mm
29	X	21.21 mm	66.6 mm
30	Y	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 →