Different types of mail-sorter shelves include desk-top cardboard or steel mesh constructions with three to six shelves, traditional plastic trays, and adjustable wooden shelving suitable for home office use. Larger, free-standing wood and metal shelving units featuring up to 72 compartments are available for large offices.
Walmart sells a range of mail-sorter shelves suitable for home office use, including an eight-compartment banker's box in white or black brocade and a recycled plastic letter desk tray with six shelves. Staples' and Office Depot's mail-sorter ranges include desktop and freestanding shelving units for small and large offices. Office Depot also offers the Safco E-Z Sort Mailroom Furniture Sorter, consisting of a steel desk unit with up to 25 adjustable shelves.