This The Rowdy Girls fan art contains
fedora, felt hat, homburg, stetson, trilby, campaign hat, boater, leghorn, panama, panama hat, sailor, skimmer, and straw hat.
There might also be
porkpie, porkpie hat, beaver, castor, dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, and beaver.