Size Studio
UK Ring Size Z in US, EU and mm
A UK (and Australian) ring size Z is about a US 12.75 and an EU 69, with an inside diameter of about 21.9 mm (68.8 mm around).
| US / CA | UK / AU | EU (ISO) | Japan | Inside diameter | Inside circumference |
|---|---|---|---|---|---|
| 12.75 | Z | 69 | 28 | 21.9 mm | 68.8 mm |
Good to know
- EU (ISO) ring sizes are the inside circumference in millimetres. US sizes go up about 0.8 mm in diameter per whole size, UK letters about 0.4 mm.
- Fingers swell when warm. Measure at the end of the day, and go half a size up for wide bands.
Sizes either side
Smaller: YOpen the full converterHow to measure yourself
Questions
What is ring size Z in mm?
About 21.9 mm inside diameter, 68.8 mm around.
What is UK ring size Z in US?
About US 12.75.
What is ring size Z in EU?
EU 69.
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