When selecting your invitations truly, this is all you really need to get your guests informed. In Step 1 you will select a package that fits your needs of what you NEED to communicate to your guests. Select from INVITATION, RESPONSE CARD, DETAILS CARD, and/or GUEST ADDRESSING to complete your package. 

You can select styled upgrades in Step 2 and 3 and Upgrade your printing method in Step 4.