Bankers Box File Medium-Duty Storage Boxes with String and Button, Letter, 4-Pack (0070408) 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