Do I just have a small head?

From Knitting

So, I went and knit my own version of Calorimetry, shown above complete with kitty for scale (ha ha). I checked the gauge and everything, and I'm even knitting a bit smaller than the recommended gauge...and it's still too big for my head. Well, I can wear it if I use one of the button holes that's really high up, but that leaves on flap kinda dangling.

This was mostly an attempt to stash bust, and I suppose it was good for that...except I can't decided if I can even wear it or not!