A one-piece blank which is folded to provide a shroud is used in conjunction with a bottom tray and securing mechanism to form a display case for enclosing an array of packages. The one-piece blank or shroud formed thereby includes a central top panel and a pair of side panels hinged thereto so that when the side panels are bent along the hinge lines to form the shroud the side panels are located adjacent respective opposed side faces of the array of packages. The blank or shroud also includes a pair of opposed projecting portions hinged to each side panel with a central hinge line therein to define a reinforcing panel and a leg panel so that when the reinforcing panels of each pair of projecting portions are bent back onto the associated the side panel the leg panels are bent perpendicular to the reinforcing panels to come together and to form a leg which is inserted laterally into the side face of the array of packages. Preferably, the blank or shroud includes a pair of squaring panels foldably attached to respective other sides of the central panel which are bent back and secured to the central panel so that the squaring panels strengthen the central panel. The reinforcing panels are also preferably immovably secured to the side panels adjacent thereto.