Rosemary is a personal favorite of mine with its hand drawn feel, playful typefaces and square layout. The letterpress printing only enhances its sweet features. And while I think the square size is worth every penny in extra postage, you could always order it in a 5x7 layout if you wanted.
I am also learning that I am a sucker for an outdoor black and white wedding. I usually associate black and white with formal, evening weddings, but I quickly learned that doesn't have to be the case. From small accents of sashes or bowties to the beautiful blooms and bridesmaids' dresses, black and white has never been prettier.