Hat size converter
Hat size is your head circumference. Measure around your head just above the ears, then convert. 58 cm is a US 7¼.
US hat size0.13
Hat size chart
| Head (cm) | US | UK | EU | S/M/L |
|---|---|---|---|---|
| 54 cm | 6¾ | 6⅝ | 54 | XS |
| 55 cm | 6⅞ | 6¾ | 55 | S |
| 56 cm | 7 | 6⅞ | 56 | S |
| 57 cm | 7⅛ | 7 | 57 | M |
| 58 cm | 7¼ | 7⅛ | 58 | M |
| 59 cm | 7⅜ | 7¼ | 59 | L |
| 60 cm | 7½ | 7⅜ | 60 | L |
| 61 cm | 7⅝ | 7½ | 61 | XL |
| 62 cm | 7¾ | 7⅝ | 62 | XL |
US and UK hat sizes are the head diameter in inches (circumference ÷ π), which is why they look odd. EU sizing simply is the circumference in cm — the easiest to use. Measure snug but not tight, where the hat will sit.
Frequently asked questions
What hat size is 58 cm?
A US 7¼ (UK 7⅛, EU 58).
How do I measure my hat size?
Wrap a tape around your head just above the ears and eyebrows, snug but not tight. That circumference in cm is your EU size.
What is a medium hat size?
Roughly 57–58 cm head circumference (US 7⅛–7¼).