Box dividers are used to organize belongings so that they are easier to find. They also can help extend a box’s life by limiting the movement of objects inside, and by acting as braces that help maintain structural integrity. To make a box divider, use cardboard purchased or made from leftover boxes. Select the number and size of partitions needed, and then cut the cardboard to its proper dimensions.
Measure the box's inside dimensions with a ruler. Write them down on a sheet of paper.
Select the number of dividers to make. It will be based on the number of partitions the box will have. For example, a comic book box might have four partitions, which means just two dividers should be created.
Cut the cardboard to its required size. Its length must be slightly less than that of the box’s width so that the fit will be snug. The divider height must be smaller than the box’s so that it leaves space for a lid.
Slide the cardboard into the box when you are finished. Repeat the procedure until all the dividers are built.
Measure the box's inner dimensions and write them down. Decide how many partitions the box should have.
Choose the number of dividers based on how many partitions are needed. For example, a jewelry box with four partitions would need two dividers. One of them would be on the top, and the other would be on the bottom.
Cut the cardboard into strips. Some of the pieces must fit along the box’s width, while some of them must fit along the box’s length. All of them must be slightly smaller than the box’s height.
Cut one or more slots into each divider and join them so that they intersect. For example, assume one divider is 21 cm by 10 cm, and another is 18 cm by 10 cm. Cut the larger piece's slot at 10.5 cm along its length. For the smaller one, cut the slot at 9 cm along its length. Place the larger one on the bottom of a box, but with its slot facing up. Place the smaller one perpendicular to the larger one, but with its slot facing down. Insert the smaller piece into the larger so that they connect to form a T shape.