Most are made for standard letter-size sheets and have external measurements around 9.5 × 11.75 inches. Some envelope-style binder pouches are larger (about 9.75 × 13 inches) to allow extra room or expansion.
Pocket counts range from single-pocket options up to four-pocket folders. Reported sheet capacities across the selection include 25, 50, 100, 150, 200, and 225 sheets.
Common options include pre-punched, non-pronged folders for 3-ring binders; folders with pronged or metal clasp fasteners; and envelope-style pouches with hook-and-loop closures or built-in binder rings in the spine.
Many folders are sold with pre-punched three-hole patterns so they can be placed directly into standard 3-ring binders. Some envelope-style pouches instead include binder rings in the spine for insertion into a binder.
Common extras include writable labels, vertical and horizontal internal pockets, and slots for a name or business card to help keep papers and contact information organized.
Where thickness is specified, paper-based folders commonly use heavier stocks such as 250 GSM and 300 GSM cardstock, indicating a sturdier build than basic paper.
Envelope-style binder pouches often include expansion (for example a 1-inch expansion) and a hook-and-loop closure. Pocket folders typically provide built-in pockets and specify sheet capacities (examples in this selection show capacities from about 25 up to 225 sheets).
