Question: How to make a template for a custom cardboard hat.
Option 0: Take a piece of yarn and measure your head with it, take that length of yarn and put it down on a piece of cardboard and trace the shape after you make it into a square.
Option 1: Take a piece of yarn and measure your head with it, take that length of yarn and put it down on a piece of cardboard and trace the shape after you make it into a circle.
Answer: 1