Da Vinci Vitruvian Man

The Vitruvian Man is a world-renowned drawing created by Leonardo da Vinci around the year 1487. It is accompanied by notes based on the work of the famed architect, Vitruvius Pollio. The drawing, which is in pen and ink on paper, depicts a male figure in two superimposed positions with his arms and legs apart and simultaneously inscribed in a circle and square. The drawing and text are sometimes called the Canon of Proportions or, less often, Proportions of Man.

According to Leonardo's notes in the accompanying text, written in mirror writing, it was made as a study of the proportions of the (male) human body as described in Vitruvius:

• a palm is the width of four fingers
• a foot is the width of four palms (i.e., 12 inches)
• a cubit is the width of six palms
• a pace is four cubits
• a man's height is four cubits (and thus 24 palms)
• the length of a man's outspread arms is equal to his height
• the distance from the hairline to the bottom of the chin is one-tenth of a man's height
• the distance from the top of the head to the bottom of the chin is one-eighth of a man's height
• the distance from the bottom of the neck to the hairline is one-sixth of a man's height
• the maximum width of the shoulders is a quarter of a man's height
• the distance from the middle of the chest to the top of the head is a quarter of a man's height
• the distance from the elbow to the tip of the hand is a quarter of a man's height
• the distance from the elbow to the armpit is one-eighth of a man's height
• the length of the hand is one-tenth of a man's height
• the distance from the bottom of the chin to the nose is one-third of the length of the head
• the distance from the hairline to the eyebrows is one-third of the length of the face
• the length of the ear is one-third of the length of the face
• the length of a man's foot is one-sixth of his height

Source from Wikipedia [via]