Answer:
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
I am a king who's good at measuring stuff.
I can be long or short. I can be grown or bought. I can be painted or left bare. My tip can be round or square. (one word)
You throw me out when you want to use me, but take me in when you donβt want to use me. What am I?
I am used when you jump off a bridge for fun.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?