Many artists want to make realistic portraits that show how someone looks. To do this, you have to learn about face proportion. We'll start with a front view. Draw a large head shape on your paper.
Eyes are halfway down the face.
So use your ruler to divide your head in half with a horizontal line. This will look a little alien until you add eyebrows and hair. You can divide the horizontal line into five equal spaces to figure out how big to make the eyes. The size of the nose depends on the person. The bottom of the nose is often as wide as the inside corners of the eyes.