This is just the chart I used for the hat shown. It is 100 stitches and I used worsted weight yarn, size 6 (ribbing) and 8 (body) needles.
Use whatever weight, size, etc. you need. Feel free to modify the chart for more of less stitches by taking out spacers, narrowing letters, dropping exclamation points, etc.
Have fun and make it yours for the Husker fan in your life!
Important Note: If you want the top part to be the same, you can find that chart in the Pittsburgh Steeler Hat by Lorna Miser created for Cascade Yarns.