Know what's in the cards for you and yours when you tie the knot. Personalize this fun mailbox gift card holder by placing a photo or message on the mailbox flag. Reception Mailbox Gift Card Holder includes an easy to assemble currogated cardboard mailbox, 2 printable labels and 1 test sheet. Mailbox measures 12in x 5 1/4in x 10 1/4in deep.