EU to US Hat Size Conversion
| EU (cm) | US |
|---|---|
| 54 | 6 3/4 |
| 55 | 6 7/8 |
| 57 | 7 |
| 58 | 7 1/8 |
| 59 | 7 1/4 |
| 61 | 7 3/8 |
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.
Working backwards, a EU 59 hat is a US 7 1/4 — handy when a European hatter's own chart only ever shows the centimetre figure and never a fractional-inch equivalent.
US hat retailers sometimes carry both a fractional-inch and a whole-number sizing convention depending on the style (flat caps and fitted baseball styles are less standardised than dress hats), so checking the specific brand's own chart alongside this conversion is worth the extra step.
Frequently asked questions
Do all US hat styles use the same fractional-inch sizing?
No — dress and fitted hats commonly do, but flat caps and some casual styles use S/M/L or a different numbering. Check the specific brand's chart if the style isn't a classic fitted hat.