Packaging guides

Short, practical guides to sizing, measuring and choosing shipping boxes.

• How to measure a box for shipping

  The right order for box dimensions, where to put the tape measure, and the mistakes that lead to boxes that don't fit.

• Inside vs outside box dimensions

  Why suppliers and carriers use different numbers for the same box, and how much difference board thickness makes.

• ECT vs Mullen box strength

  What the ratings on a box maker's certificate mean and how to pick board strength for your product's weight.