How to Make a Cardboard Box (with Pictures) - wikiHow
05-12-2020· This should divide the cardboard into four equal sections, that will form the four sides of the box. If you want a rectangular box instead of a square one, use sections with two different measurements. For example, to make a 4" x 2" box, divide the cardboard into a 4" section, a 2" section, another 4" section, and another 2" section, in that order.