US to Australia ring size
Convert a US ring size to Australia — instantly, and with the exact millimetre diameter so you can order with confidence.
Australia uses the UK/AU/IE letter scale; this chart shows the matching UK-style letters plus millimetre measurements.
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Your size is US 7 (UK N½, EU 54).
Fit confidence Exact table match
Fit confidence 70/100 · Medium Standard chart conversion; final fit still depends on band width and knuckle shape. Confirm with a printable or physical sizer before ordering an expensive ring.
- US
- 7
- UK
- N½
- EU / ISO
- 54
- Japan
- 14
- CH / IT / ES
- 14
- Inner diameter, millimetres
- 17.32
- Circ mm
- 54.4
Why this size?
Your input maps to US 7 — UK N½, EU 54, JP 14, Ø 17.32 mm.
Inner diameter is exact to about ±0.1 mm. String or on-screen methods add roughly ½–1 size of noise, so confirm with a second method before buying an expensive or non-resizable ring.
More options
Choose the fit problem and get the safest next step before resizing, replacing or buying another ring.
Too tight or stuck Too loose or spinning Wide band or comfort-fit Non-resizable or brand ring
| US | UK | EU | JP | CH | Inner diameter, millimetres | 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 |
US-to-Australia conversion chart
| US | Australia | Inner diameter, millimetres | Circ mm |
|---|---|---|---|
| 3 | F½ | 14.07 | 44.2 |
| 3.5 | G½ | 14.48 | 45.5 |
| 4 | H½ | 14.88 | 46.8 |
| 4.5 | I½ | 15.29 | 48.0 |
| 5 | J½ | 15.70 | 49.3 |
| 5.5 | K½ | 16.10 | 50.6 |
| 6 | L½ | 16.51 | 51.9 |
| 6.5 | M½ | 16.92 | 53.1 |
| 7 | N½ | 17.32 | 54.4 |
| 7.5 | O½ | 17.73 | 55.7 |
| 8 | P½ | 18.14 | 57.0 |
| 8.5 | Q½ | 18.54 | 58.3 |
| 9 | R½ | 18.95 | 59.5 |
| 9.5 | S½ | 19.35 | 60.8 |
| 10 | T½ | 19.76 | 62.1 |
| 10.5 | U½ | 20.17 | 63.4 |
| 11 | V½ | 20.57 | 64.6 |
| 11.5 | W½ | 20.98 | 65.9 |
| 12 | Y | 21.39 | 67.2 |
| 12.5 | Z | 21.79 | 68.5 |
| 13 | Z½ | 22.20 | 69.7 |
Frequently asked questions
How do I convert a US ring size to Australia?
Enter your US size in the converter above, or find it in the chart below and read across to the Australia column. Both use the same canonical chart on Ringsizely.
Are US and Australia 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.
How should I confirm a converted ring size before ordering?
Measure the same finger or a ring that fits with a second method. For an expensive, wide, or non-resizable ring, check the retailer's chart and confirm with a physical sizer or jeweller.
Explore
See the full international ring size chart · Ring Size Conversions — All Systems & Sizes · EU→US