Princess skirt, named after the princess line cutting method, is one of the most popular dresses at present. The clothing term 1 is the dividing line in clothing, which can sew two clothes together; To make the clothes fit but not tight, the princess line is the middle line extending from the shoulder, and there is also the back line of the knife, which is only the line on the back waist side. Clothing term 2 refers to the curves on the front and back panels starting from armholes, passing through the chest and dividing by the waist. Also known as the back line of the knife, it plays the same role as saving, highlighting the aesthetic feeling of the chest and waist, which is more in line with the curve of the human body than saving.