Objective: Distance between the philtral ridges, measured just above the vermilion border, more than 2 SD above the mean
Subjective: Apparently increased distance between the ridges of the philtrum
The mean width of the philtrum was found to be 7 mm in infants by Franz and Sokol  and 9.7 mm in adults by Ward and Jamison . Measuring width of the philtrum is even more inaccurate than measuring length (vide supra). A broad philtrum may be associated with reduced ridge prominence or a shallow groove, a Smooth philtrum, which should be assessed and coded separately. It may be found with a broad nasal septum.