US to Australia ring size converter
Australia and New Zealand use the same A to Z letter sizing as the UK and Ireland, so converting from US means going from a number to a letter. A US 6 is about an AU L½ and a US 7 is an AU N½. Convert your size below and print a sizer if you need one.
Quick answer
A US 7 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.
US → Australia at a glance
- 4 = H½
- 5 = J½
- 6 = L½
- 7 = N½
- 8 = P½
- 9 = R½
- 10 = T½
- 11 = V½
US to Australia ring size chart
| USUS / Canada | UKUK / AU | mmCircumference | mmDiameter |
|---|---|---|---|
| 4 | H½ | 46.7 | 14.9 |
| 4½ | I½ | 48.0 | 15.3 |
| 5 | J½ | 49.3 | 15.7 |
| 5½ | K½ | 50.5 | 16.1 |
| 6 | L½ | 51.8 | 16.5 |
| 6½ | M½ | 53.1 | 16.9 |
| 7 | N½ | 54.4 | 17.3 |
| 7½ | O½ | 55.6 | 17.7 |
| 8 | P½ | 56.9 | 18.1 |
| 8½ | Q½ | 58.2 | 18.5 |
| 9 | R½ | 59.5 | 18.9 |
| 9½ | S½ | 60.7 | 19.3 |
| 10 | T½ | 62.0 | 19.7 |
| 10½ | U½ | 63.3 | 20.1 |
| 11 | V½ | 64.6 | 20.5 |
| 11½ | W½ | 65.8 | 21.0 |
| 12 | X½ | 67.1 | 21.4 |
Common questions
How do I convert a US ring size to Australia?
Enter your US 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 US 7 in Australia?
A US 7 is N½ in Australia. That ring has an inner circumference of about 54.4 mm.
Related conversions
Or see the full ring size chart.