Please choose the correct solution to the question: How to make a template for a custom cardboard hat.

Solution1: 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.

Solution2: 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 format: solution1/solution2
Answer: solution2