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
Tree height measurement length, and by moving your arm up and down; 2) once aligned, measure the distance from the top of your hand grasping the base of the stick to your eye; 3) measure the distance from the top of your hand to the top of the stick; 4) measure the distance from your eye to the base of the tree. So long as the yardstick is held straight up and down and the top of the tree is vertically over the base, the various measurements are still proportional and then you can calculate the height of the tree using a simple