So you finally mustered the courage to design and stitch a hat. Yay, you! Designing your own knitting projects opens up endless possibilities in your knitting. Figuring out how to stitch a hat isn't easy at first, though. Let's start with the most basic issue when learning how to stitch a hat: How do you calculate the number of stitches to cast on?
Knitting Math 101: How to Calculate Stitches in Knitting