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
Link (unit) known remaining application of the link is in the service of some surveying in the United States, which relates then to the definition of the survey foot. During most of its useful life, a modern degree of precision in the link's measure was neither expected nor possible. For historical purpose, though, we can establish three highly accurate conversions to SI equivalents. Link (unit) The link (usually abbreviated as "l.", "li." or "lnk."), sometimes called a Gunter’s link, is a unit of length formerly used in many English-speaking countries. A link is exactly of a foot, or exactly 7.92 inches or