1. Inside dimensions are always used in box measurement.
2. Dimensions are always given in sequence of length, width and depth (height).
3. Length is always the larger of the two dimensions of the open face of a box as it is set up for filling.
4. Width is the smaller dimension of the open face.
5. Depth is from top to bottom of a box set up for filling.
6. End opening boxes are measured as if they were top opening.
7. Tubes and folders with three dimensions are measured in the same way as boxes; with length being the larger of the two dimensions of the open face and width the smaller.

Confused? Just give us a call and we'll be happy to walk you through the process.