The Ancient Arabic units of measurement were a system of using units to associate with physical quantities. Arabic symbols are used to represent the values. The measurements were based on body measurements and common natural items. The length of forearm, shin and the standard size of a typical village were among the most accepted length units. About surface, usually Jerib or Djerib, was the most usual unit which is mostly similar to acre or hectare. Another unit known as Sa was mostly used to measure volume which is approximately equal to 3 liters. Although having similar names, the size of units may differ depending on region.