I just used 2 - 3" strips of designer paper. On one strip I traced the lid, folded the piece in half and cut out 2. The other strip I cut at 8 1/2 inches and adhered around the mailbox. My ribbon piece was 16 1/2 inches. Then I added some rubbons to the flag and to the front (on the dp). I'll try to add a photo in a bit. This way you can do 2 mailboxes from one sheet of dp.
The adhesive I used was Tombow Mono Multi.
THe link to my photo:
Mailbox with Rub-Ons by craftdoc at Splitcoaststampers