4×8 industrial polyethylene plastic sheet factory--HDPE Sheet goods me in standard 4′ x 8′ sheets and range in thickness from 1/16″ to 3/4″. In volume quantities, up to 1-1/2”. Custom sizes available, call us for options and minimu. natural INDUSTRIAL hdpe sheets 4×8-HDPE sheets 4×8, Custom . 1.Classification of HDPE sheet. HDPE industrial sheet.