Gah! My mailbox is tall and narrow. Maybe 3"x3" wide and 9" tall. Diva, I did say standard postcard size (4x6) but no bigger than 5x7. I think 5x7 is even too big for my mailbox, but the post person has been really nice to set packages on the ledge above the mailboxes in the hallway, so larger may be okay.
*crossing fingers*
cara