a pre - folded automatic bottom box form made from a unitary blank of material . the form has a blank of corrugated material that is die cut and creased so as to form a series of panels and flaps arranged in three rows of four panels or flaps each and a fourth row with two panels , all arranged in four columns , a first row comprising four panels that end up in the box as an automatic bottom , a second row comprising four panels that end up in the box as sidewall and end wall panels , a third row contiguous with the second row and comprising four panels that end up in the box as reinforcing sidewall and end wall panels , and a fourth row coupled to the third row and comprising first and second panels making additional end wall reinforcing panels .