Develop balance in two stages with this convertible balance beam set: begin with the wider 3 1/2" surface and then present the more challenging 1 1/4" surface. The set is constructed from solid hardwood and finished in a clear lacquer for durability. Both narrow and wide sides of the 72" long beam fit the convertible supports. The bases have rubber matting on the bottom to prevent slipping. Beam - 3 1/2" x 1 1/4" x 72" 2 Bases - 4" x 12"