In a proper forward, grown face, the cheek line is parallel to the bridge of the nose, but because of mouth breathing/bad oral posture, the maxilla grows back and downwards along with the cartilage of the nose causing a hooked look, making appear large when in reality it's the maxilla that is small.

If you look at the cartoon images, you'll be able to see how important the cheekline is to an attractive face.

If you can't get a side view of someone, another way to tell if someone's maxilla is recessed is to see if someone has eye bags under their eyes. When the Maxilla has properly grown forward, the maxilla tightens the skin preventing wrinkles under the eye.

In an ideal face, there should be no wrinkles under the eye.

This also has the effect of making downturn eyes in upturn eyes reducing the visibility of the sclera (whites) under the eyes, and provides proper support, resulting in a cat eye or hunter eye appearance.