You need to take lots of factors into account when you choose sunglasses. Such as hair style, the hair color, your skin color, your face shape, figure, and even the style of your dress. Two most important factors may be the face shape and the hair color. So, whether you are petite woman or willowy woman, you can wear a certain sunglasses if the can be matched with your face shape and hair color.
Do not try liner type frame if your face shape is more like curve shape. Try on those bright colors if your hair color is inclined to light colors.
Some women like to wear men's sunglasses for cool look, petite women should never wear that kind of sunglasses.