Many organizers are sized to hold standard A4 paper, and some multi-compartment models list a capacity of about 500 sheets per compartment.
Yes — several models offer adjustable or removable shelves so you can resize compartments or remove them entirely to fit taller files, binders, or other items.
Assembly varies by model: some multi-panel literature organizers advertise quick, roughly 10-minute assembly, while many drawer-style sets ship ready to use with no assembly required.
Some organizers include extras such as a mail slot, pull-out drawers, key hooks, a chalkboard or note board, and label tags for sectioning and identification.