Round Face Shapes
Your goal is to create less volume around the face. You also want to minimize the appearance of roundness.
Styles that are flattering and stylish: Try cuts that fall just below the chin. Soft, graduated layers are a great bet because they make your face appear slimmer and tend to remove bulk and weight from the sides. Consider wispy and tapered ends. These de-emphasize the roundness of your face. Bangs are flattering, but keep them long or side-swept.
Avoid: One-length, blunt cuts if you have short hair. Curly, short hair is also a no-no. These only emphasize your roundness.
Square Face Shapes
If you have a square face, you'll want to play down your strong, angular jaw. Texture, in the form of curls or choppy ends, does this brilliantly. You can also get away with short, spiky cuts and long, sleek styles with layers that start at the jawline and continue downward.
Avoid: One-length bobs (especially chin-length) and blunt-cut bangs. These will make your face look even more square
Oval Face Shapes
The oval face is the most versatile shape. You can pull off almost any look: short or long, straight or wavy. For your own most flattering look, consider your best feature and highlight it with your hair cut.
If you have gorgeous bone structure, consider an angular bob that shows off your chin. Great eyes? Blunt or side-swept bangs are a great bet.
Styles that are flattering and stylish: sophisticated bobs, bangs, long, beachy waves (think California surfer girl).
Avoid: Short layers that add height on top of your head. Aside from being dated, short layers can make your face appear long. If your hair is thick or curly, avoid a blunt cut.Long or "Oblong" Face Shapes.
Ahhh, the Long Face Shape. The perfect haircut for us is one that doesn't drag down the face, yet adds width.
Styles that are flattering: Brow-skimming bangs (I plan to never go without them again). Chin-length bobs are also ideal for us because they create the illusion of width. Gwyneth Paltrow's shoulder-length bob is very flattering on a long face. Just make sure your stylist cuts the hair a bit shorter in the back so it doesn't look boring. Curls and waves work well because they add width to the face.
Be careful with long hair: Hair that is too long like Demi Moore's can drag down the face. Long layers work best with pieces hitting at the nose, the chin and the collarbone. Consider a v-shaped style where the length is mainly in the back, while the sides and front of your hair appear shorter. Also consider adding wave or curls to the hair
Heart Face Shapes.
Your pointy chin tends to be the focal point of your face. Draw attention to your eyes and cheekbones instead with side-swept bangs (like Paris Hilton pictured here), brow-grazing fringe, a strong part and hair that falls at or below your jawline. Have short hair? Keep top layers soft and long. Long hair? Go for long layers that graze your cheek bones.
Avoid: Short, blunt-cut bangs and harsh, choppy layers.