Note that along the eye line from ear to ear, should be roughly 5 eyes wide. This means that your eyes have an eye length between them. Draw simple curved lines above your eyes to indicate eyebrows. Their placement doesn’t matter quite as much as the other elements of the head, though you might like to experiment with different eyebrow placement and shape.
Lastly draw the mouth line (between the lips) half way between your bottom of nose guideline and your bottom of lip line.
