This Harry Potter Vs. Twilight fan art contains
fedora, felt hat, homburg, stetson, trilby, boater, leghorn, panama, panama hat, sailor, skimmer, and straw hat.
There might also be
porkpie, porkpie hat, dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, hip boot, and thigh boot.