ART BIN-Essentials: Storage Case. This clear plastic storage box is perfectly sized for holding 12×12 inch papers. It is simply one large open space with no dividers and can also be used to hold a variety of other tools and supplies. The hinged lid stays securely closed with two latches and a molded in handle makes carrying easy. Overall dimensions are 14x14x3 inches. This package contains one storage case. Acid free.