Hand (unit) radix numbering system, where a hand is four inches. The hand, sometimes also called a handbreadth or handsbreadth, is an anthropic unit, originally based on the breadth of a male human hand, either with or without the thumb, or on the height of a clenched fist. On surviving Ancient Egyptian cubit-rods, the royal cubit is divided into seven palms of four digits or fingers each. Five digits are equal to a hand, with thumb; and six to a closed fist. The royal cubit measured approximately 525 mm, so the length of the ancient Egyptian hand was about 94 mm. In
Facial width to height ratio Facial width to height ratio Facial width to height ratio (fWHR) is a measure derived from archaeological skull measurements. fWHR is not linked with adolescent testosterone, and has been proposed as: a predictor of aggression, cause of death by violence, and also with CEO success probability. While most studies have found some significance some have found little correlation. fWHR has also been used in primate studies with similar findings. Width is measured as upper bizygomatic width (the widest central bit of the face), height measurement used is upper facial height, from the top of the eyelids (approximately the nasion) to