POSTAGE
Never assume what the postage will be. Once you have your wedding invitations created and ready to send, be sure you take one complete invitation (with all insertions) to the post office and have it weighed.
WHEN TO MAIL
To avoid hurt feelings, all wedding invitations should be mailed at the same time. Mail invitations four to six weeks before the event to give your guests time to reply.
There can be exceptions to this if you have the majority of your family coming from
out of town. If most of your friends are in town, you might
consider sending your invitations in two mailings. The first set of invitations goes out earlier to your out of town guests
to allow them time to plan the trip. As you receive RSVPs from out-of-towners, you'll have a good feel for how many will be attending. You can then send your local invitations
the typical 4-6 week prior.
MORE RESOURCES TO HELP YOU WITH YOUR WEDDING INVITATIONS