Picture comparison of the difference between a normal head shape and a square head shape. The most significant feature of the difference between a normal head shape and a square head shape is the facial shape. The face of a normal head shape is relatively even in length and width, showing an oval face shape, while a square head shape is The wider width gives a square face shape. A comparison of a picture can more intuitively show the difference between the two head shapes. Introduction to head shape classification and characteristics: Normal head shape The characteristics of a normal head shape are that the face is basically oval, the forehead and chin are relatively narrow and the proportions are relatively coordinated, that is, the head is not abnormally twisted or deformed. In people with normal heads, it is not clear that the cranial sutures have closed.