Sturdy particle board construction - pieces screw and hammer together (Assembly Required) Many desks lack upper shelving, which is great for storage. Made specifically to fit on top of desks! Wide left pocket can fit a computer monitor or laptop Overall Dimensions: 37"L x 9.5"D x 29"H Top Cubes: 11.5" L x 5.3"H, Side Cubes: 12"L x 12"H This bookshelf is perfect for placing over a regular desk that doesn't have an upper bookshelf area, adding usefulness and convenience to any desk.