How do you measure a box?

   Measure the width of the package. The width of your box is the shorter side of the bottom or top face (or the open side) of the box. Measure the full distance of this side from one end to the other using a measuring stick.
  • Round this measurement off to the nearest inch (2.5 cm), as well.
  • Even if you mix up the height and width measurements, the final calculation should not be thrown off. The only side you absolutely must identify accurately is the length.