Last updated: September 2026 · By The Hatloom Team
Quick answer: Hatloom's fit team uses one simple method to find your hat size — wrap a soft tape measure around your head about 1 cm (½ inch) above your ears and eyebrows, where a hat actually sits. Keep it level and snug, not tight. That measurement in centimetres is your hat size. For example, 57 cm = size M (US 7⅛, UK 7). If you are between sizes, size up.
How to measure your head — the Hatloom fit method (3 steps)
Hat size chart (international)
| Head (cm) | Head (in) | Size | US | UK | EU |
|---|---|---|---|---|---|
| 54 | 21¼ | XS | 6¾ | 6⅝ | 54 |
| 55 | 21⅝ | S | 6⅞ | 6¾ | 55 |
| 56 | 22 | S/M | 7 | 6⅞ | 56 |
| 57 | 22½ | M | 7⅛ | 7 | 57 |
| 58 | 22⅞ | M/L | 7¼ | 7⅛ | 58 |
| 59 | 23¼ | L | 7⅜ | 7¼ | 59 |
| 60 | 23⅝ | L/XL | 7½ | 7⅜ | 60 |
| 61 | 24 | XL | 7⅝ | 7½ | 61 |
| 62 | 24⅜ | XXL | 7¾ | 7⅝ | 62 |
Between two sizes? Size up
A hat that is slightly loose is more comfortable and can be adjusted with a foam sizing strip inside the sweatband. A too-tight hat leaves a red mark and causes headaches. Most Hatloom caps have an adjustable band or cord, so they cover a range (for example 54–61 cm).
Quick reference
Every Hatloom product page lists the exact cm range. Start with all hats or all caps.
Frequently asked questions
How do I measure my head for a hat without a tape measure?
Wrap a piece of string around your head 1 cm above the ears, mark where it overlaps, then measure the string against a ruler. The length in centimetres is your hat size.
What is the average hat size?
For men, 57–59 cm (M–L); for women, 55–57 cm (S–M). The most common single size is 58 cm.
Should I size up or down if I am between hat sizes?
Size up. A slightly loose hat can be tightened with a foam sizing strip, while a too-small hat is uncomfortable and cannot be stretched much.
What does hat size 7 1/8 mean?
It is the US measurement equal to about 57 cm head circumference, or size M. US sizes are based on the head’s diameter in inches.
