Keep in mind that invitations do have an important job. No matter how carefree or nontraditional you and your fiancé are, the invitation should include the date, time and location of the wedding and the reception. If you expect a response from your guests, it is also important to include a self addressed envelope with postage included. As long as these important pieces of wedding etiquette are adhered to, you can be as unique and nonconforming as you like with the rest of the invitation.
Size, Shape and Weight of Your Invitations _ Finally you should also consider the size, weight and shape of your wedding invitations as these can increase postage costs especially if you have many invitations that need to be posted.