These large modular bookcase storage cabinets are a great deal. We are looking to sell each assembled unit individually. If you need a smaller bookcase they are modular so you can reduce the total length of the fully assembled shelf. Each individual modular shelf unit measures 88" Tall x 42" Wide x 12" (shelf) / 24" Deep (total for front and back). The entire set is 24.5 FT Long and 2 FT Deep.