6 1/4 Inch (Width) by 8 Inch (Height) RetroFit "Snap-In" Mailbox Door Replacement - White Easy Snap-In Replacement 3 Easy Steps No Expensive Contractors No more Saws, Crowbars, Chisels or Glues Fits USPS Standard Mailboxes measuring approx 6 1/4"(W) x 8"(H)