Sides are creased at different intervals. Cut to the creased height needed, fold down and you have a custom sized box height.
Boxes can have a manufacture size variance +/- 1/4” on each side.
When assembled, these boxes measure Length x Width x Height. The Length is the horizontal distance on the
longest side. Width is the horizontal distance on the shortest side. Height is the vertical distance from top to
bottom when assembled.
These boxes have an ECT rating. For example, 32 ECT can withstand 32 pounds of pressure per inch width stacked
on the edge of the corrugated board.