Centimetres
What size hat is 53 cm?
53 cm around the head is 20.9 inches — here is that measurement in every hat sizing system.
A 53 cm head takes US fitted hat size 6 5/8 (head circumference 20 7/8 inches, UK size 6 1/2, EU 53, letter roughly S).
US fitted
6 5/8
for a 53 cm head
In cm…
53
= 20.9
UK size
6 1/2
= US minus 1/8
EU size
53
≠ 53 — EU rounds the chart row's cm
Sizes near 53 cm
| US | UK | Head (cm) | Head (inches) | EU | Letter |
|---|---|---|---|---|---|
| 6 5/8 hat size | 6 1/2 | 53.0 | 20 7/8 | 53 | S |
| 6 3/4 hat size | 6 5/8 | 53.9 | 21 1/4 | 54 | S |
Check any measurement
The converter turns cm or inches into every hat system, live as you type.