My hair is about 3A right now with some 3B in the under layer around the nape. I only ever did Brazilian Keratin and along with consistent flat iron took me down to around 2A/2B even after it wore off. I wore a lot of pony tails while it was growing out and did a big chop about 6 months down the road. I am about 2 years past my last keratin treatment but I was still ironing a lot so I just took about 4 inches off and am swearing off the ironing for good. So over the course of 2 years it went from chin length to about brastrap length and now it falls to my shoulders when wet but bounces up when dry.