Scent-Lok's most popular light headcover seems to fit on fat old noggins pretty well. Even with it pulled across your face, you can breathe and hear better than before.
It has a 20" neck relaxed and is stretchy, and it seems to have a good bit of headroom.
Side note from Joe at BigCamo: "I have a fat head, and NO headgear gets on the site without fitting me. This passed the test, for me."
Now go kill something!
Realtree Xtra or Mossy Oak Bottomland!!