The chin length is short – exactly one fifth the height of the face. The distance from the bottom of the eyebrow to the center of the face is relatively long – one tenth the height of the face. The individual eye width is large – consistently it was three-tenths the width of the face at eye level. The visible eyeball is large too – one fourteenth the height of the face – and so is the width of the pupil – one fourteenth of the distance between wide cheekbones.

D. McLellan, “In your face: Why do we like someone´s looks?”