Five or six thousand. . . . First of all, from a scientific point of view, the thickness of male lips is greater than 9 mm, and the lower lip is greater than10.5 mm; Female upper lip is more than 8 mm and lower lip is more than 9 mm, which is a thick lip. Thick lips can generally be divided into the first day and the day after tomorrow. Congenital factors are genetic factors, and acquired factors may be pathological changes or some bad living habits. ...