The elbow was a unit of length used in many cultures for its anthropometric origin. In almost all of them was the distance between the elbow and the end of the open hand ( 41 real elbow; or closed fist ( 41 vulgar elbow; Logically, its value varied from one country to another, even within the country, according to their use. Egyptian elbow ( 41 meh; measuring about 0.45 m. Egyptian real elbow, used since the dynasty III, had 0,523 m. The elbow of Mesopotamia measuring 0,533 m. The Nippur ELL had 0,518 m.1 40 Babylon elbow; Lagash ) was 0,496 m. The elbow of the Empire was Persian 0.500 m. 40 Greek elbow;41 A?CA±; was 0,463 m. The elbow of the Roman Empire amounted to 0,4444 m. Arabic elbow ( Omar ) measuring 0.64 m. 40 Arabic elbow;Black ) had 0.54 m. Tunisian elbow was 0,473 m. The elbow of Morocco was 0,517 m, also of 0,533 m. The elbow of Calcutta measuring 0,447 m. The elbow of Ceylon was 0,470 m.En Castilla used common elbow, half wand, which amounted to 0,418 m and also real elbow or ribera, 33 fingers, or 0,574 m. It is likely El Escorial is projected in real 31 fingers elbows, i.e. 0,5398 m.2Los moriscos used elbow more than 33 inches, i.e., 0,8387 m, and medium elbow, 24 inches, which was equivalent to 0.61 m.