Geometry
Blank
A blank is the flat piece of material cut to shape before it is folded or assembled into packaging.
What it means in packaging
The blank includes panels, flaps and tabs. Its overall width and height describe its flat footprint, which can be much larger than the assembled box. A package with a separate lid and base requires more than one blank.
A practical example
A shallow mailer may fit a small product while its open lid and side walls make the blank several times wider than the finished box.
What to check
Compare the full blank, including bleed and production gaps, with the usable sheet or cutter bed.