I just sat down to start addressing our save the dates and hadn't planned on writing things as formally as I will with the invitations. For example, rather than Saying Mr. and Mrs. Smith, I wrote The Smiths. Is this incorrect? I've only addressed few and can redo them, but it didn't seem necessary to be as formal with the STDs. Additionally, given the smaller size of the STD envelopes, I thought it would look better rather than trying to squeeze everyone's name on. How have other addressed theirs?