The Architectural Mailboxes Soho Wall-Mount Mailbox comes with mounting hardware and installation instructions for hassle free setup. This preassembled galvanized steel, single box mailbox has a large (10-1/2 in. W x 1-1/2 in. H) incoming slot and a spacious mail compartment. The mail carrier can put your mail and parcels in the slot, which is located discreetly below a hinged top flap. Color: Sand.