UK to Australia ring size
Good news: UK and Australian ring sizes are the same. Both use the British A to Z letter scale, so a UK N is simply an Australian N. The chart below shows the shared letters alongside their US, EU and millimetre equivalents, in case you are shopping across systems.
Quick answer
A UK N½ is N½ in Australia (about 54.4 mm inner circumference). Use the converter for your exact size, or the chart below for the full range.
Between two sizes? Size up for a comfortable fit, see how to measure accurately.
UK → Australia at a glance
- H½ = H½
- J½ = J½
- L½ = L½
- N½ = N½
- P½ = P½
- R½ = R½
- T½ = T½
- V½ = V½
UK to Australia ring size chart
| UKUK / AU | mmCircumference | mmDiameter |
|---|---|---|
| H½ | 46.7 | 14.9 |
| I½ | 48.0 | 15.3 |
| J½ | 49.3 | 15.7 |
| K½ | 50.5 | 16.1 |
| L½ | 51.8 | 16.5 |
| M½ | 53.1 | 16.9 |
| N½ | 54.4 | 17.3 |
| O½ | 55.6 | 17.7 |
| P½ | 56.9 | 18.1 |
| Q½ | 58.2 | 18.5 |
| R½ | 59.5 | 18.9 |
| S½ | 60.7 | 19.3 |
| T½ | 62.0 | 19.7 |
| U½ | 63.3 | 20.1 |
| V½ | 64.6 | 20.5 |
| W½ | 65.8 | 21.0 |
| X½ | 67.1 | 21.4 |
Common questions
How do I convert a UK ring size to Australia?
Enter your UK size in the converter above and read the Australia result, or find your row in the chart below. Every value is calculated from the ring’s inner circumference, so it works in both directions.
What is a UK N½ in Australia?
A UK N½ is N½ in Australia. That ring has an inner circumference of about 54.4 mm.
Related conversions
Or see the full ring size chart.