Many women go to the hairdressers and end up really mad when they leave because what they ended up with is not what they chose out of the book or magazine. This happens to be your hairdressers fault because she should have explained to you that the cut you chose is not for your face shape. Your hairstyle will end up to look different than the one in the book because your the shape of your face is different than the models in the book. I have listed some face shapes here and you can find more with some research.
The most ideal shape of the face is the oval. If you are one of the lucky people who have an oval shape then you can wear just about any hair style. An oval face shape has a length that is one and a half of the width of the face. If you have an oval face shape then you have a rounded hairline and also a rounded chin.
Having a round face shape doesn't mean that you have a fat face like many people believe. Width and length of a rounded face happens to be around the same size. For any woman that has a round face type they should try to add some volume at the crown of the head, and have the rest of the haircut close to the face. This makes your rounded face seem longer. Anybody with a round face shape will not need any width added to their hair.
If you have a face that is wide at the forehead, wider cheekbones, and a narrow chin then you have a heart shaped face. Attention needs to be taken away from the tiny chin and out towards the forehead and eyes. Add some bangs over to one side but be sure you do not ask for short bangs or any chopped layers.