All adult heads look different, and yet they all have two eyes, two ears, a nose and a mouth. When working from a model or a photo, start by lightly drawing the fundamental proportions in pencil or charcoal. Then make adjustments specific to your particular subject as you go along by concentrating on what you actually see.
A - From the top of the head to the chin, the eyes are positioned approximately in the middle.
B - The eyes are about one eye-width apart.
C - The bottom of the nose is halfway between the eyebrows and the chin.
D - The ears are positioned between the horizontal lines of the eyebrows and nose.
E - The mouth is placed between the nose and chin, about two-thirds of the way up from the chin.
F - On the profile, notice that the ear is placed behind the vertical center line.
Proportions of the Human Body