For a standard box (RSC, HSC, etc…) the most common and best way to call out the size of it would be L x W x D. Where “L” is the length and the longest side, “W” is the width and the short side, and “D” is the depth of the box. The given dimensions should be the inside dimensions or ID of the box. Rarely will boxes be measured by the OD or outside dimensions of the box. Things do tend to get a bit more complicated when calling out sizes of PDQ trays and other display type designs. Here, OD’s can become more important as retailors can dictate maximum shelf and footprint sizes of designs. When the final product will be placed on retail shelves, dimensions are often called out by W x H x D. “W” width, is the length along the shelf, “H” is the height of the design, and “D” is the depth of the design from the edge of a shelf to the back wall. In all cases, a simple and crude sketch will always be helpful in communicating the dimensions.