ELL

An 'ell' (from Proto-Indo-European
★ el- "elbow, forearm), when used as an English unit of length, is usually 45 inches, i.e. 1.143 m (for the international inch). It was mainly used in the tailoring business but is is now obsolete. It was derived from the length of the arm from the shoulder (or the elbow) to the wrist, although the exact length was never defined in English law.
Several different national forms existed, with different lengths, including the Scottish ell (approximately 37 inches), the Flemish ell (approximately 27 inches) and the Polish ell (0.78 metres).Sometimes ''ell'' is used as an alias for the cubit.