I modified the hat so it fits a bit better. As proof, above is a photo of me wearing it yesterday, sitting by a load of giant bells at the British Museum (my last name is Bell...). You'll have to excuse the dark shadows and slightly dazed look, I was a bit off colour over the weekend and not sleeping that well.
I frogged it down a good couple of inches. The patten says to work for six inches before starting the crown decreases, but in this version there is a bit under four. It's still slouchy enough for me to tuck my hair inside, if the mood so takes me (useful when it's windy).