Symmetry is another factor that determines a face's attractiveness. Dr. Kendra Schmid, an assistant professor of biostatistics at the University of Nebraska Medical Center, says there is a formula for the "perfect" face. She uses 29 different measurements to determine someone's appeal on a scale of 1 to 10.
To start, Dr. Schmid says the ratio of the length of the face to the width of the face should be 1.6, also known as the golden ratio. "The face should also be divided into three equal pieces vertically," she says. "The forehead, then [the bottom of the forehead to] the nose and then from the nose to the chin."