The decision you and your fiancé have is only one of many when it comes to planning your wedding day. If you have planned a themed wedding, then a unique wedding invitation can be a little easier to come up with. Let your imagination go with the theme of your wedding and do not be afraid to step out of the box. If you are having a Hawaiian themed wedding, you could send out invitations to your guests that have images of luaus and Hawaiian flower leis.
On the other hand, if your unique wedding invitations are of a particularly unusual design, chosen to reflect your own personal style as well as the style of your wedding, your guests may know they can expect something nontraditional.