Bankers Box STOR/FILE Medium Duty Storage Boxes, FastFold, String and Button, Letter, 4 Pack (0070403) Medium duty box with double bottom, double end and 1-1/2 side construction This box offers 30% greater stacking strength than other brands and is ideal for storage with or without shelving Locking lift-off lid stays in place to secure box contents Smooth rolled box edges add strength and help prevent paper cuts Size: 10" x 12" x 24" inch Extra Strength - For moderate use and higher stacking needs Medium-duty box offers 25% greater stacking strength than other brands. Ideal storage for inactive files, works with or without shelving. Easy one step FastFold(TM) set up