12×24 mat —
11.60″ × 9.91″
ECMA B20.01 with FEFCO 0435's stacking tab and 0427's lid. The end walls fold back down inside themselves, a bump on each folded edge tucking behind a tongue slit into the base; the side walls carry past the corners into flaps those inner walls trap. Two tabs stand above each end wall's rim and rise through the base of the tray above. The lid hinges off a side wall and carries a full-height front wall with a lobe folded in off each end; notched at each tab, it lies flat and cannot slide. Ours, not a catalogue code.