Common materials shown are plastic polypropylene and paper/cardstock. Some paper options specify heavier stock (for example, 300 gsm) while many reusable or water-resistant styles use polypropylene.
They are described as 3-hole punched (three-ring compatible), so they can be stored in standard three-ring binders.
Package quantities range from single folders up to small multi-packs (for example, 6-packs) and large bulk packs such as 100-count, so you can find packs from 1 to about 100 items.
Options include translucent solid colors, solid black, multicolor assortments, and decorative printed cardstock styles (for example, geometric prints and gold-foil accents). Finishes range from plain matte cardstock to translucent or glossy polypropylene.
Plastic/polypropylene covers and pockets protect against bending, wrinkling, and light spills; water-resistant plastic options add extra protection. Sturdy pockets and reinforced edges help keep 8½" × 11" papers in place.
They are designed for standard letter-size paper and are listed as holding 8½" × 11" sheets (standard letter-sized documents).