Answer:
A king wears one on his head.
You use it between your head and your toes, the more it works the thinner it grows. What is it?
How can you throw a ball as hard as you can, to only have it come back to you, even if it doesnβt bounce off anything?
A standard dimension for sandwiches and rulers
In a year, there are 12 months. Seven months have 31 days. How many months have 28 days?
Break me and I am better immediately set and harder to be broken again.