This is my second ‘math hat’ as I like to call them. First time was the first 25 digits of Pi, this time was c ¹, twice since it’s only 9 digits. I have more of this yarn sitting around so I plan to make more math hats.

Again, I didn’t make the hat as long as the pattern called for, and I found I really like wearing this hat pulled down all the way with the ribbing flipped up, so a little more like a beanie than a stocking cap.

First and last photos are colour accurate.

Finished hat weighs around 41g