This Brigitte Bardot photo contains
fedora, felt hat, homburg, stetson, trilby, snap brim hat, beaver, and castor.
There might also be
boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, pith hat, pith helmet, sun helmet, topee, and topi.