One the the newest (and neatest) trends in wedding invitations are chalkboard style invites. These invitations give the look and feel of an old fashioned restaurant chalkboard menu or a school blackboard. The look of these invitations is very authentic. See for yourself by clicking image to view or order from Zazzle.
Square 5.25" by 5.25" Chalkboard Invitations
Zazzle also have a very nice selection of 5 x 7 inch invitations. There is a huge variety for bridal showers, engagement parties, wedding rehearsals and save the date cards.
As you can see you can also order matching sets that include postage stamps and even numbered table cards.
You can also pick your own paper, there are 20 types and colors available. I personally love their recycled paper.
Retro Invitations, Gifts & Party Ideas