The campaign included a save the date mailing and a separate invitation mailing, with specific inserts for each state. A custom die was used to create the invitations. This allowed the large form invite to fold down into an envelope and resemble a traditional invite, while creating a pocket for the insert.
https://sundanceusa.com/portfolio/print/item/300-canine-companions-21st-tales-tails-gala-campaign#sigProIdce09122b41