Eagle binder pocket with gusset is well made of  acid-free durable polypropylene, water and tear resistant. Measure of 11.5נ9.5 inches, suitable for storage of letter size documents, and come in a pack of 12 in assorted colors. It is designed with expandable gusset for larger capacity and can hold up to 200 sheets of standard papers. With 3 holes on the left side, it fits standard 3-ring binders. Great for school, office and home use.