How do I know this, you ask?
I had an assembly line approach going throughout the day, and just did a step here and there when I had some time: pick the papers, draw the template, cut out the shape and fold, glue into place. Suddenly, I had this pile in front of me!
Rather than use the Mirkwood Designs template that I used last time, I used a template I found on Scrapbook Crazy. It allows you to make the same style library card pocket in three sizes:
Now you HAVE to make some!