Table 1. Description of reliable landmarks of the face .

S. no.	Landmark	Description
1.	Menton	A triangular projection in the external surface of the mandible in the midline
2.	Commissure of the lip	The junction of the vermillion border of the superior labium meets that of the inferior labium
3.	Gonion	A maximum curvature in the posterior mandibular region where the ascending ramus becomes the body of the mandible
4.	Ala of nose	The tissue comprising the lateral boundary of the nose, inferiorly surrounding the nares