The sorting hat
Oh you may not think I'm pretty but don't judge in what you see. I'll eat myself if you can find a smarter hat than me. You can keep your bowlers black and your top hats sleek and tall. For I'm the Hogwarts sorting hat and I can cap them all.
There's nothing in your head the sorting hat can't see so try me on and I will tell you where you ought to be! So put me on don't be afraid and don't get in a flap you're in safe hands because I'm a thinking cap!