A key detail of both the original 2D game and our 3D shelves is that front and back edges of each piece are beveled away from the interior surfaces. This bevel provides for an eleven-inch shelf depth while giving the piece an unreal optical quality when viewed from an angle. Reversible and interchangeable, these sturdy blocks will provide for endless stacking configurations and a lifetime of enjoyment. Choose set of 5 or set of 10. Set of 5 includes one of each shape, set of 10 includes two of each shape. Picture on left is of 10 pieces.