Here are some inspiration photos to give you some ideas. Since Valentine's Day is close, I've included a bunch for that holiday, but the way they are made could be adapted for lots of other seasons or themes. Enjoy!
Photo Sources - All of my sources for the inspiration photos in this post can be found on my Pinterest Board - Vintage Show Off Posts. Now I have two boards that will help you. I have a feeling I may need to add more as time goes on. I'll be adding links to any I create on my sidebar.
The rest of the photos are just to inspire you with banner styles.