The Imperial Box #8 is a modern cast-aluminum mailbox with octagon designs on both sides of the box as well as the door. It includes one large brass knob, a small hinge, a flag assembly and any necessary hardware. This is one of Imperial’s standard-sized box and the dimension are as follows: BOX 8 Height: 8.5″ x 11.75″ x 20.75″ BOX 8 Weight: 12.12 lbs. NOTE: This is a Standard sized box, and it uses a hinge with three holes. If your current box has four holes in the hinge, you have an Estate sized box. Shop for Estate Boxes here: Estate Sized Boxes