Question: How to make a template for a custom cardboard hat.

  Options: 
 A. 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.
 B. 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: B