Answer:
What is the thing that stays the same size, but the more it's used the more it decreases?
Ripped from my mother's womb. Beaten and burned, I become a blood thirsty killer.
As light as a feather, but you canβt hold it for ten minutes.
I can be moved. I can be rolled. But nothing will I hold. I'm red and I'm blue, and I can be other colors too. Having no head, though similar in shape. I have no eyes - yet move all over the place.
We are five little objects of an everyday sort. You will find us all in a tennis court.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?