ART BIN-Essentials: Storage Case. This clear plastic storage box is perfectly sized for holding 12x12 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.