It's not just one wider than the 4X7 tray... oh wait, yes it is! Actually it better than that. for those of you who like to column march, this works quite well at that. So here is what you do police up a couple dozen infantry. Set them in a column three wide send them at a fast march down the side of the battlefield. Once you get out far enough take a sudden left (or right) and hit you opponents from the front with one unit and this unit digging into the side.