Curbside Mailboxes

Mailbox Size & Construction Standards

A mailbox with the Postmaster General's (PMG) seal of approval meets USPS size and construction standards. If you build your own mailbox or buy a custom-made one, it must meet the PMG standards. Show your local postmaster your mailbox plans or your custom-made box for approval.

To get drawings and measurements for building your own mailbox, write to US Postal Service Engineering.

Want to buy a mailbox big enough for packages? See Next Generation Mailboxes.