Nine and a half inches deep is the number that decides where this bookcase can go - it sits against a hallway or bedroom wall without narrowing the walkway, while still spanning 39.5 in wide and 42 in tall. Eight cubes come in two sizes: six at 12.5 x 12 in and two wider ones at 19 x 12 in, so paperbacks and box files each get a slot that fits. The top holds 110 lbs and each cube 25 lbs. Five tapered metal legs - four at the corners plus a center support - raise the carcase 4.5 in off the floor, enough for a robot vacuum to pass beneath. Two anti-tipping kits and back panel clips are included. Engineered wood and MDF with a wipe-clean white finish.