Vitruvius discovered that the length of a man’s ear is one-third of the length of his face, and the length of a man’s foot is one-sixth of his height. As a child, I was asked to measure the distance from the tip of my head to the floor and divide it by the distance from my belly button to the ground. The number I came up with is the same number that nearly everyone will. A ratio of 1.618.
