Size Studio
UK Ring Size F in US, EU and mm
A UK (and Australian) ring size F is about a US 2.75 and an EU 44, with an inside diameter of about 13.9 mm (43.8 mm around).
| US / CA | UK / AU | EU (ISO) | Japan | Inside diameter | Inside circumference |
|---|---|---|---|---|---|
| 2.75 | F | 44 | 4 | 13.9 mm | 43.8 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
Larger: GOpen the full converterHow to measure yourself
Questions
What is ring size F in mm?
About 13.9 mm inside diameter, 43.8 mm around.
What is UK ring size F in US?
About US 2.75.
What is ring size F in EU?
EU 44.
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