Japan to US ring size
Convert a Japan ring size to US — instantly, and with the exact millimetre diameter so you can order with confidence.
Your size is US 7 (UK N½, EU 54).
Fit confidence Exact table match
Measurement confidence 74/100 · Medium Discrete Japan size matched against the canonical chart. Confirm with a second measuring method before buying.
- US
- 7
- UK
- N½
- EU / ISO
- 54
- Japan
- 14
- CH / IT / ES
- 14
- Ø mm
- 17.32
- Circ mm
- 54.4
| US | UK | EU | JP | CH | Ø mm | Circ mm |
|---|---|---|---|---|---|---|
| 3 | F½ | 44 | 4 | 4 | 14.07 | 44.2 |
| 3.5 | G½ | 45 | 5 | 5 | 14.48 | 45.5 |
| 4 | H½ | 47 | 7 | 7 | 14.88 | 46.8 |
| 4.5 | I½ | 48 | 8 | 8 | 15.29 | 48.0 |
| 5 | J½ | 49 | 9 | 9 | 15.70 | 49.3 |
| 5.5 | K½ | 51 | 10 | 11 | 16.10 | 50.6 |
| 6 | L½ | 52 | 12 | 12 | 16.51 | 51.9 |
| 6.5 | M½ | 53 | 13 | 13 | 16.92 | 53.1 |
| 7 | N½ | 54 | 14 | 14 | 17.32 | 54.4 |
| 7.5 | O½ | 56 | 15 | 16 | 17.73 | 55.7 |
| 8 | P½ | 57 | 16 | 17 | 18.14 | 57.0 |
| 8.5 | Q½ | 58 | 17 | 18 | 18.54 | 58.3 |
| 9 | R½ | 60 | 18 | 20 | 18.95 | 59.5 |
| 9.5 | S½ | 61 | 19 | 21 | 19.35 | 60.8 |
| 10 | T½ | 62 | 20 | 22 | 19.76 | 62.1 |
| 10.5 | U½ | 63 | 22 | 23 | 20.17 | 63.4 |
| 11 | V½ | 65 | 23 | 25 | 20.57 | 64.6 |
| 11.5 | W½ | 66 | 24 | 26 | 20.98 | 65.9 |
| 12 | Y | 67 | 25 | 27 | 21.39 | 67.2 |
| 12.5 | Z | 68 | 26 | 28 | 21.79 | 68.5 |
| 13 | Z½ | 70 | 27 | 30 | 22.20 | 69.7 |
Japan-to-US conversion chart
| Japan | US | Ø mm | Circ mm |
|---|---|---|---|
| 4 | 3 | 14.07 | 44.2 |
| 5 | 3.5 | 14.48 | 45.5 |
| 7 | 4 | 14.88 | 46.8 |
| 8 | 4.5 | 15.29 | 48.0 |
| 9 | 5 | 15.70 | 49.3 |
| 10 | 5.5 | 16.10 | 50.6 |
| 12 | 6 | 16.51 | 51.9 |
| 13 | 6.5 | 16.92 | 53.1 |
| 14 | 7 | 17.32 | 54.4 |
| 15 | 7.5 | 17.73 | 55.7 |
| 16 | 8 | 18.14 | 57.0 |
| 17 | 8.5 | 18.54 | 58.3 |
| 18 | 9 | 18.95 | 59.5 |
| 19 | 9.5 | 19.35 | 60.8 |
| 20 | 10 | 19.76 | 62.1 |
| 22 | 10.5 | 20.17 | 63.4 |
| 23 | 11 | 20.57 | 64.6 |
| 24 | 11.5 | 20.98 | 65.9 |
| 25 | 12 | 21.39 | 67.2 |
| 26 | 12.5 | 21.79 | 68.5 |
| 27 | 13 | 22.20 | 69.7 |
Frequently asked questions
What is Japan 14 in US ring size?
Japan 14 is US 7 (inner diameter 17.32 mm, circumference 54.4 mm).
How do I convert a Japan ring size to US?
Enter your Japan size in the converter above, or find it in the chart below and read across to the US column. Both use one dataset verified against ISO 8653.
Are Japan and US ring sizes the same?
No — they use different scales, so the numbers do not match and must be converted. International equivalents are approximate; when possible, order by millimetre diameter.
Explore
See the full international ring size chart, browse all conversions, or try EU→US.