This Mark James photo contains
fedora, felt hat, homburg, stetson, trilby, dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, and beaver.
There might also be
boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, well dressed person, suit, pants suit, pantsuit, porkpie, and porkpie hat.