the standard size of a hopper hut was either by or by , though some were as large as by . early huts were of timber, and during the latter half of the 19th century corrugated iron sheets were used to clad them. following the abolition of the brick tax in 1850, brick huts were built. exterior walls were thick and partitions between individual huts 4½" (115mm) thick. during the 1930s and 1940s, some hopper huts were built of by breeze blocks, these being cheap and plentiful after the end of the war. a few huts were made from pre-cast concrete at this time. nissen huts were also used as accommodation for hop-pickers.