What a neat idea!
You print your invitation wording on the top of the card.
Your guests fill out the bottom portion, detach & bring them to your event.

The bottom, detachable part of this invitation says:

My Favorite Recipe

Let's help the bride build her recipe library. Simply detach bottom portion, fill in with a recipe you'd like to share and bring to the gathering. Thanks!

Each kit contains the following:

10 Printable Detachable Invitations (Pink & White Design as shown above-left)
10 Blank Envelopes
2 Practice Sheets

Finished size of the invitation is 5.75" x 8.75".

To set up your invitations on your computer, change the paper size in your word processing program to height: 8.75 and width: 5.75. Align your wording depending on the card design (make the bottom margin bigger). Each kit comes with two practice sheets.