Common materials include plastic, steel, polyurethane, and paper/cardboard.
Most organizers are sized for letter paper (8.5 × 11 in). Some products explicitly state they also accommodate legal-size paper and support hanging folders.
Mesh (steel) and open-front or open-top designs make contents easy to see and allow quick access from the front or top.
Many include carrying features such as sturdy handles or contoured grips; some crate-style holders have built-in handles. Reviews also frequently note items are lightweight, easy to carry, portable, and often stackable.
Common features include in-lid or top compartments for small items, indexed/stackable covers, label holders for identifying contents, and—on some crate-style holders—internal rails that support hanging files.
Reviewers most often report that boxes fit letter-size papers and comfortably hold multiple hanging folders; several listings and reviews also note that some items accommodate both letter and legal hanging files.