If your invitation is 6" x 9", don't send all items together in a 6" x 9" envelope, as the fit will be too snug.
To fit your invitation, RSVP card and RVSP envelope in one mailing, use a 6" x 9" envelope. Only this size has enough space for these three items together:
Invitations 4.6" x 7.2" or 5" x 7"
RSVP card 5.5" x 4"
RSVP envelope 5.5" x 4"
