BEST FOR Long hair that is layered near the ends elongates faces that are heart-, square or round-shaped. MORE TIPS TO MAKE IT YOUR OWN Layers are an easy way to update your style and add definition to medium or long hair. If you have an oblong-shaped face, opt for a slightly shorter version, around collar-bone length. Also, don't rule out layers just because you have curly hair! "When cut all around, they add shape and keep curly hair more manageable," says hairstylist Ursula Stephen.