I did that in the 6th grade.  Went from lower back length hair to even shorter than planet's hair.  At the time i was a tomboy and LOVED not having to do a damn thing to it. However, my mom hated suddenly having a preteen boy. Lol. I only hated that she made me style it when i dressed up.  So i eventually grew it back out. It took like 4 years to get it back to the same length as before.