To ensure your graphic will fit well on a sliding rear window, you will need to design it in three separate pieces. We will need precise measurements for each portion of the window: the left, middle (sliding), and right side. Obtain the following measurements from each portion of your window:
With these measurements we can provide enough material for full-coverage on each section, and ensure that your design will fall within the confines of your window. It always helps if you have the opportunity to send a picture of your rear window along with the measurements, as this will give us the best chance of ensuring you will have a great fit.
If you plan to design offline, keep in mind that for each section of the window your design should leave one inch of exterior area that is free of text between your message and the edge of the window. Additionally, you will have the best results if you order an extra inch on all four sides of each window piece (so an additional two inches to the overall height and width).