Study sorter made of compressed wood with adjustable hardboard dividers. Stack up to two high. Black plastic molding accent doubles as a label holder (labels included). Durable laminate finish complements any setting. Solid fiberboard back provides stability. Large sorting compartments accommodate oversized envelopes. 4 7/8 x 11 3/4 x 5 1/4. The installation holes for the shelf pegs are spaced 5-1/4 inches apart. So shelves can be mounted to make the compartments as small as 5-1/4 inches high and can be adjusted higher at those intervals. Literature Sorter Type: Open Front Mail; Number of Compartments: 18; Compartment Size: 4 7/8 x 11 3/4 x 5 1/4.