Jugerum

Iugerum, jugerum, iugera or iugus (in Latin, the last form, as a neuter noun of the third declension, is very common in the oblique cases and in the plural) was a Roman unit of measurement of area, 240 pedes (Roman feet) or 71.0 m in length and 120 pedes or 35.5 m in breadth, containing therefore 28,800 pedes quadratum. That is 0.623 acre or 0.25 ha.