I purchased this stand, along with the WB11 twin Weeble Boards, the 16" Professional Balance Board, and the CMBLB Combobble Board. All four (4) boards fit in this stand; however, the tri-level sphere on the 16" board must be moved to the lowest level to fit within the space provided between boards. I believe that this item does its job, which is all one could expect of it. The one addition I would make to it would perhaps be rubber feet to place on the bottom.