ACU /Camo /OD Military Boonie Hat-Woodland (x-large) Military specs Chin strap with cord lock to keep secure Lightweight and crushable with flat top and floppy brim S (6 7/8 - 7) M (7 1/8 - 7 1/4) L (7 3/8 - 7 1/2) XL (7 5/8 - 7 3/4)