When the work is time-critical, that can mean the difference between a successful project and a missed deadline. Step 6 Finish your banner by adding some text. Please note our acceptable size variance is up to 1/2 inch per linear foot (ex. A 5 ft banner could finish with a 2.5 inch variance). If your banner size needs to be precise, please ask your Customer Service Representative to discuss your specific application. You can create a collage of photos for a banner in Photoshop or Photoshop Elements very easily.