LEGO has been distributing mini comics with their DC and Marvel universe building boxes. The comics are wordless, usually 12 pages long with one or two adds for more LEGO Super Hero building boxes. The comics come in three sizes, 21 x 26 cm landscape and portrait, or 12,5 x 17 cm portrait. Some come in all sizes available. The issues are all one shots. Issue numbers relate to the serial numbers on the back of the issues.