Short Bob Hair StyleModel Short Bob Hair Style-square model and oval face. so the model's hair style is very suitable for those of you who have oval face, If you have a very round face, get a longer version. Bob hair style is ideal for short straight hair. To get a gamine, face-hugging effect, the length of the longest piece of hair should be about one inch above the chin. To maintain short Bob haircut looks well kept, you need to visit the salon about once a month.