At 16.5 in wide, 11.5 in deep, and 21 in tall, this two-cube bookcase fits the gaps a full-size unit cannot: beside a bed, under a window, or at the end of a desk run. The middle shelf sets into five positions across a 2.5-in range, so the same cube can hold a tall stack of records below and paperbacks above, or split evenly for storage boxes. The top plate takes 66 lbs and the inner shelf 44 lbs, while the frame itself weighs only 14 lbs and can be lifted with one hand.