Drawing a face isnt as hard as it looks. To begin, you start with an egg shaped oval. Draw a line down the center of this egg. This line will give you a midpoint for measuring eye separation, nose wide, etc.
Next, separate the egg shape into 3 equal portions with 2 lines. The top of the egg will be be the top of the hairline and the bottom of that segment will be the eyebrows. The second segment goes from the eyebrows to the bottom of the nose. The third segment goes from the bottom of the nose to the bottom of the chin.
Two of these segments turned sideways will give you the measurement sideways from cheek to cheek.
The measurement of one eye should be equal to the distance between the 2 eyes. The corner of each eye should line up with the wings of the nose.
If you divide the third segment (under the nose) in half you have the line for the bottom of the bottom lip. The corners of the mouth should line up with the middle of the pupil of the eye.
The ear should be visible from a front view as it does not sit flat on the side of your head.
This can be found by finding the middle segment from the eyebrow to the bottom of the nose. The ear should only stick out about as far as from the center line of the head to the wing of the nose.
The hair can be drawn by drawing the hair from the edge of the ear up. The top of the hair is ? of one of the segment lengths up from the hair line.
This is only a basic face layout. A lot of the shapes on a face are defined by underlying bones and musculature. In order to accurately depict a face, it is necessary to understand some of the anatomy. The eye, the nose and mouth are the main structures that must be closely examined in order to correctly draw a face.