Stylish sunnies work effortlessly to make you look good in the sun. When shopping, pick the pair that best fits your face shape and head size for the most flattering look. Aviator sunglasses and cat-eyes work best on those with small heads; oversize frames flatter on larger noggins. If you have a heart-shape face, try cat-eye or rounded frames. Face more oblong? Go for oversize or a wrap-style pair. If your face is square, try rounded or oval frames. Select an angular pair to counterbalance the curves of a round face. No matter the frame style, choose UV-rated sunglasses to protect your peepers and polarized options to minimize glare.