Normal values for the height of the vermilion are available [Farkas, 1981], but measurements are not commonly used. Most clinicians determine this feature subjectively or utilize the Likert scale of Astley and Clarren [2000] (Fig. 17). The vermilion of the upper lip varies considerably among ethnic groups, and the vermilion should be compared to a population of same ethnic background. The thickness of the upper lip vermilion is sensitive to the facial expression. On profile view, a thick vermilion is more convex than usual.