a foldable display stand includes a wall blank having substantially flat wall panels connected end to end foldably relative to each other to define a continuous wall structure . the wall blank is convertible to a flattened state for storage and transportation and an expanded display state in which a number of wall panels cooperatively bound a polygonal display space . each of two side wall panels has a flap foldable inwardly to place the flaps in juxtaposition so as to form a polygonal shelf within the display space . the shelf and rear wall panel are interconnected by shelf tabs fitting releasably within a slot in the rear wall panel . a removable tray is supported on the polygonal shelf and braces the interior of the continuous wall structure . the tray is releasably secured within the display space . the display stands are modular and may be releasably vertically stacked . openings in the continuous wall structure are formed of a geometrical configuration to receive articles having a similar configuration .