USPS Commercial Mailbox STD-4C Regulations & Requirements

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However, the USPS has established minimum size requirements for mail compartments: at least 12 inches wide, 3 inches high, and 15 inches deep Parcel

Mailbox Regulations For The Door · The door slot should be approved when the opening is at least 1 ½” × 7″ · The bottom of the door slot should be at least 30″ Horizontal mail slots require a flap on top, for added protection, while vertical slots need a hinge opposite the door's hinges Curbside and

panda777 slot The opening must be at least 1 12″ x 7″ · The bottom of the slot must be at least 30″ above floor · Horizontal slots must have a flap hinged at the top  Locked designs : a Mail slot design b tomers if their mailbox does not meet postal regulations Alpha