The bigha or beegah is a traditional unit of measurement of area of a land, commonly used in northern & eastern India, Bangladesh and Nepal. There is no "standard" size of bigha and it varies considerably from place to place.
Sources have given measurement of Bigha ranging from 6,805 square feet to 72,880 square feet. Its sub-unit is Biswa or Katha in many regions, but it has no "standard" size. A bigha may have 5 to 20 Katha/ biswa in different regions. From Wikipedia
