The rubber mallet in the box is a small thing that tells you how the unit assembles. Modular cube panels connect with plastic clips that need to be seated firmly, and tapping them home with a mallet is the difference between a rigid unit and one that wobbles. Supplying the tool means the assembly is done properly rather than by hand and hope. The stair-shaped arrangement measures 37 in long by 12.4 in wide and 38.3 in high, which is a shape that does something a rectangular block cannot. It steps down, so it works beside a desk, along a staircase wall, or as a low divider where a full-height block would feel like a wall. Each cube is 11.8 in on every side and carries 22 lb, which is real capacity rather than display-only. Construction is PP plastic panels on a metal frame with ABS connectors, bringing the assembled unit to 8.8 lb. Being modular, the same panels can be rebuilt into a different arrangement when the room changes, which is what separates a cube system from a fixed bookcase.