This Ian Somerhalder and Nina Dobrev fan art contains
fedora, felt hat, homburg, stetson, trilby, boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, beaver, and castor.
There might also be
dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, cavalier hat, slouch hat, pith hat, pith helmet, sun helmet, topee, and topi.