There are no written rules to what a menu should look like or how many pages long it should be, it depends very much on how many menu items you have. However, many menu designs are built with the standard paper size in mind: Letter paper size (8.5 x 11 in). Other menu sizes can be: 4.25 x 11, 5.5 x 15, 8.5 x 14, 11 x 17, 11 x 25.5 in.