On February 14th, 2015 I drew a 24-Hour Comic in which each page had the same number of panels as its page number, and each page's panels were equal in size. I thought it would be fun to release a blank template of this panel structure for others to use. It is a DRM-free PDF and the panels are licensed under a creative commons attribution 4.0 international license (allowing other cartoonists to use it as they see fit!). You can download it for free, or make a small donation if you prefer.
PLEASE NOTE: the panels in the PDF are blank (panel borders only) so that you can print them out and start drawing. The panels above are only filled in so that it is easier to see the layout.