A full jawline is very prominent and provides the face with a square shaped chin. There will be a widening of the lower third of the face with the forehead and chin being the same width. The face overall will be very broad and long in length. The squarer the jaw, the smaller the angle
A strong jawline is often a trait from birth, however, can also develop over time. Like any muscle within the body, the muscles in the jaw can develop with exercise. This exercise can include consistent chewing of gum, grinding and clenching of the teeth.
Full jawlines can often be considered as a masculine trait; however, in many cultures, it is considered as a sign of beauty.