Answer:
I am a band that does not perform sing or act.
What comes in many different sizes but is always only 1 foot long?
No matter how little or how much you use me, you change me every month.
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 shoot me but I don't die. You hang me but I don't die. What am I?
How do you know if a sniper likes you?