Answer:
What has roots that nobody sees and is taller than trees. Up up up it goes and yet never grows?
I am a king who's good at measuring stuff.
As a state in America I am round on both sides and high in the middle.
Take off my skin I won't cry but you will.
In my life I must bare my bloodline I must share.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?