our modular bookcases and cubby bookcases are all 2 feet by 2 feet by 11.75 inches. Shown here are four single horizontal fixed shelf bookcases and two horizontal and vertical fixed shelf cubby bookcases. Mix and match to suit your needs. We can even drill holes in all of them to accept the feet so that you can re-arrange them when you get bored. Get a third set of feet so you can do a 2 tall and 3 wide in addition to the 2 wide 3 tall shown here.