Petal lip and M lip are mainly reflected in the difference of lip shape. There is an obvious concave arc in the middle of the lower lip of petal lip, which looks like a petal. On the other hand, the upper lip bead of M lip is prominent, the lip peak is higher than that of lip bead, and there are two gaps between the upper lip and the lower lip, just like the letter M.

The structure of petal lips is similar to that of petals, belonging to a relatively full lip type, and the radian looks just right, so many times the petal lips with distinct facial features will be more prominent. Petal lips are more suitable for women with smaller faces and will be more delicate. Because this lip shape with five senses in one will make the whole person's aesthetics reach the extreme, the popularity of petal lips is also very high.

M-lip is the most standard lip shape, and it is the most attractive from the perspective of popular aesthetics, because it stands out from lip bead and looks a bit playful. The lip contour also presents a beautiful M-shape, which makes the lip more plump and stylish. This type of lip is the best in shape, outline and state after lipstick.