Less than an inch and a half, I'd estimate about a half inch in the back, maybe an inch in the very front.

It's not the shampoo?
steadyman1 Reviewed by steadyman1 on . Need opinion please I just found out today that I have to take a Psychemedics hair test tomorrow afternoon. I last smoked 81 days ago...I know that supposedly the hair test can detect up to 90 days, but is there a shot I can pass? Rating: 5