Abstract: This invention relates to a cut and scored blank for forming a tray pallet, a preform formed by erecting the cut and scored blank, and the tray pallet formed from the blank and preform. The blank is formed of a planar body of sheet material cut and scored to form a substantially square main portion bounded by two cut edges and two score lines, each score line being parallel to an adjoining side cut edge of the body and being spaced from the adjoining side cut edge a predetermined distance which is a minor fraction of the length of the adjoining side cut edge, and the two score lines crossing adjacent one corner of the body to define with adjacent side cut edges of the body a square corner area.