plastic folder with clear front pocket

Most clear-front folders and binder pockets are made from polypropylene or other plastic materials.

They commonly accommodate letter-size (8.5" x 11") documents. Listings also show external dimensions around sizes such as about 9.5 x 11.5 inches and similar measurements.

Sheet capacities shown in listings range from about 50 up to 150 sheets, and some binder sleeves are noted to hold "70 or more" sheets.