The most important types of containers are 20- and 40-ft containers, whose sizes allow transport of 14 or 29 pallets, respectively. The measurements of a 20-ft container are 6.06 X 2.44 X 2.59 (L X W X H in m; external); 40-ft containers measure 12.19 X 2.44 X 2.59 (L X W X H in m; external).