Without a trained eye assisting or the opportunity to try the styles, colours and shapes that suit your height, face shape, dress and hair style it can be confusing to know what to choose with the plethora of styles pictured here.
Below are some very tried and tested rules which can help you choose.
Pretty much any hat will suit you. Far back of your head or extreme front of your face, most positioning work on you. Streamline shapes especially compliment you as well as brims swept up on the side(s). Crowns should not be narrower than your cheekbones.