Holds Large Textbooks & Heavy Books Each shelf supports up to 7 lbs, with interior dimensions of 13.39"L x 9.06"W. Perfect for thick college textbooks, chemistry books, reference binders, and oversized materials. Adjustable Shelf Height Customize your storage by sliding wooden dividers along grooved slots. Three compartments offer 2" height and one 1.5" height to fit books, magazines, and folders of varying thicknesses.