I have a fairly big head as well (I can't really wear an adjustable baseball cap for instance, unless I cut my hair short), but the DK2 worked for me, with a li

I have a fairly big head as well (I can't really wear an adjustable baseball cap for instance, unless I cut my hair short), but the DK2 worked for me, with a little room to spare. It also worked for my 4 and 7 year old kids.