<human>: Objective: How to make a template for a custom cardboard hat.

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- 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.
- 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.
<bot>: 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.