Conversion · Switzerland to United Kingdom

Swiss to UK / Australia ring sizes.

Swiss 14 = UK / Australia N 17.19 mm across · 54.0 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.

Swiss	UK / Australia	Diameter	Circumference
0	C½	12.73 mm	40.0 mm
1	D	13.05 mm	41.0 mm
2	E	13.37 mm	42.0 mm
3	E½	13.69 mm	43.0 mm
4	F½	14.01 mm	44.0 mm
5	G	14.32 mm	45.0 mm
6	H	14.64 mm	46.0 mm
7	H½	14.96 mm	47.0 mm
8	I½	15.28 mm	48.0 mm
9	J½	15.60 mm	49.0 mm
10	K	15.92 mm	50.0 mm
11	L	16.23 mm	51.0 mm
12	L½	16.55 mm	52.0 mm
13	M½	16.87 mm	53.0 mm
14	N	17.19 mm	54.0 mm
15	O	17.51 mm	55.0 mm
16	P	17.83 mm	56.0 mm
17	P½	18.14 mm	57.0 mm
18	Q½	18.46 mm	58.0 mm
19	R	18.78 mm	59.0 mm
20	S	19.10 mm	60.0 mm
21	S½	19.42 mm	61.0 mm
22	T½	19.74 mm	62.0 mm
23	U½	20.05 mm	63.0 mm
24	V	20.37 mm	64.0 mm
25	W	20.69 mm	65.0 mm
26	W½	21.01 mm	66.0 mm
27	X½	21.33 mm	67.0 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 →