Conversion · Japan to Europe

Japan / China to EU / ISO 8653 ring sizes.

Japan / China 14 = EU / ISO 8653 53 16.79 mm across · 52.7 mm around

Both scales describe the same physical ring. The EU size is simply the inner circumference in millimetres, so the conversion is the measurement itself.

Japan / China	EU / ISO 8653	Diameter	Circumference
1	outside range	12.99 mm	40.8 mm
2	outside range	13.28 mm	41.7 mm
3	outside range	13.58 mm	42.7 mm
4	44	13.87 mm	43.6 mm
5	44	14.16 mm	44.5 mm
6	45	14.45 mm	45.4 mm
7	46	14.74 mm	46.3 mm
8	47	15.04 mm	47.2 mm
9	48	15.33 mm	48.2 mm
10	49	15.62 mm	49.1 mm
11	50	15.91 mm	50.0 mm
12	51	16.20 mm	50.9 mm
13	52	16.50 mm	51.8 mm
14	53	16.79 mm	52.7 mm
15	54	17.08 mm	53.7 mm
16	55	17.37 mm	54.6 mm
17	55	17.66 mm	55.5 mm
18	56	17.95 mm	56.4 mm
19	57	18.25 mm	57.3 mm
20	58	18.54 mm	58.2 mm
21	59	18.83 mm	59.2 mm
22	60	19.12 mm	60.1 mm
23	61	19.41 mm	61.0 mm
24	62	19.71 mm	61.9 mm
25	63	20.00 mm	62.8 mm
26	64	20.29 mm	63.7 mm
27	65	20.58 mm	64.7 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 →