I got Zyali in September of last year... so I've had him about six and a half months now. He's up to about 475g, and I'm not sure how old he was before then - a tiny little worm. He arrived on 9/2, and my scale didn't arrive until 9/24, so that was his first weigh-in at 105g. He's been on a food strike for the past month, while he protested being switched to rats, so he hasn't gained weight in that time. I'm going to guess that he was a month old or so when I got him, so he'd be maybe eight months old now.
Incidentally, be cautious about Ball Python Addiction. She's your first girl... and I bought Zyali and Miqula at the same time. They were my first Ball Pythons. In six months I went from two to six, and I want more.