Aussie Breezer hat offers a heavy duty mesh design, 3'' brim, chin strap & 1'' self band. Cotton/Poly/Twill/Nylon. SIZE: Med = hat size 7-7 1/8, head measurement 22 1/4. Large = hat size 7 1/4-7 3/8, head measurement= 23. XL = hat size 7 1/2-7 3/4, head measurement= 23 7/8.