Size vs length and Weight Ratio

[frost]

Hi Folks,

there is somebody selling me a Super Pastel Ball and he says it is 4 months old only. It cost about 200 USD. I wanna make sure i make the right choice since this is my 1st ball (i already own a albino burm) so i will be doing all the standard checks (clear eyes, responsive, no physical damage or deformities.. etc...).

but i wanted to make sure that i am really buying a juvenile. so my question is there an estimated weight, length, age ratio for BP?

also last note... me being new might be tricked into buying a pastel sold as a super pastel... any sure indicators that what i am holding is a super pastel?

thanks in advance!!!