Combat Uniform OD Military Boonie Hats by Rapid Dominance (Large, Woodland Digital) 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)