Invitations like this one, as well as 'Save the Date' reminders and Birth Announcements, are printed on a 5x7 postcard. Design just one side like this birthday invitaion, or design both sides for added customization. Choose your favorite picture from your Pet'ographique Portrait Session and we'll add all the details! Paper options include watercolor, linen and pearl. All cards come with envelopes and can be ordered in sets of 25.