US to EU Hat Size Conversion
| US | EU (cm) |
|---|---|
| 6 3/4 | 54 |
| 6 7/8 | 55 |
| 7 | 57 |
| 7 1/8 | 58 |
| 7 1/4 | 59 |
| 7 3/8 | 61 |
Sizing conventions vary by brand and by cut — this table shows the standard published conversion. Always check the garment's own size chart when one is available. See how these tables are compiled.
A US 7 1/8 hat converts to a EU 57 on the standard chart, translating the fractional-inch scale into the centimetre head-circumference figure European hat brands use instead.
Because a EU hat size is just a head circumference in centimetres, the most reliable way to buy from a European hatter is to measure your head directly with a tape rather than converting the US number, especially for a structured style with little give.
Frequently asked questions
Should I convert my US hat size or measure my head directly for a European purchase?
Measuring directly in centimetres is more reliable — the EU size is a direct head-circumference figure, so it removes a conversion step and any rounding that comes with it.