Age estimate?

So I've had Rosie since september 11th of last year, so I've only had her for 4 almost 5 months now. I Bought her at Petsmart (I know stupid of me, I should've gone through a breeder but i fell in love with her.) She was only there 2 weeks before I bought her. I was feeding her medium sized f/t mice but they seemed not to be doing much for her so i bumped it up to a large mouse every week, shes taken 2 of them fine the past few weeks. Anyway, anyone know how old she could be?

http://i48.tinypic.com/apgv9x.jpg
Bad hand comparison
http://i48.tinypic.com/2v7ymab.jpg
Her slithering about in her vivariumhttp://i45.tinypic.com/2r75wys.jpg

It is impossible to say for sure as they al grow at their own rate, but I would say 6-8 months old

What's her weight? I would guess less then a year

I was also thinking 6-8 months old, and unfortunately i have nothing to weigh her with yet :/

Typically, pet stores like that get them in at around 3 months old. So, I think your estimate is right on the ball. :P