A wedding invitation should include multiple components.
1. RSVP card: A card where guests can let you know if they will be attending your wedding. Include a self-addressed and stamped envelope they can send back to you.
2. Invitation card: This is the main part of the invitation. Include all the information for your wedding, like your names, the location, date, time, and your wedding website URL.
3. Map: Include a map with directions to the location, especially if you have out of town guests.
4. Belly band: This is basically a nice strap that goes around all of the loose items to hold them together.
5. Envelope