This is a paper collection tray, like an inbox, for a small carbon copy piece of paperwork that I receive multiple times a day at work. Instead of having them loosely stacked, I wanted an option to have them within a little tray, so that they're not at risk of getting knocked into another stack. I think this will work for any size paper, as you should be able to simply adjust the length / width / height to your specific requirements. The tiered down front of this tray is meant to allow you to easily pick up the stack of papers from the tray.