The sizing is as follows:
Small/Medium: Hat size 5 ½–6 7/8, measurements 19"–21.5"
Large: Hat size 6 7/8–7 7/8, measurements 21.5"–24"
X-Large: Hat size 7 7/8–8 1/2, measurements 24"–26"
So you should need a size large.
The sizing is as follows:
Small/Medium: Hat size 5 ½–6 7/8, measurements 19"–21.5"
Large: Hat size 6 7/8–7 7/8, measurements 21.5"–24"
X-Large: Hat size 7 7/8–8 1/2, measurements 24"–26"
So you should need a size large.