This Jake Abel fan art contains
fedora, felt hat, homburg, stetson, trilby, boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, sign, poster, text, and chalkboard.
There might also be
dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, newspaper, paper, magazine, tabloid, rag, and campaign hat.