Snake age???

Ok so i just got a new Yellow Belly ball...i was just wanting to know an approximate age. He weighs 155 grams, the guy at the reptile expo was sure of the dob because he is just the guy who travels with the snake and not the guy who actually breeds that snakes. He said it was a few months and i just wanted to back that up. Thanks for the help

That sounds about right. Most hatch at 40 - 90 grams or so from my understanding. I would guess about 4-5 months old

How well do you know "the guy at the reptile expo"?
Unless you've hatched it yourself, you have no way of knowing for sure.

I have a girls born in August and October that are within 20g of each other.

They all grow at a different rate. I would guess around October based on the weight, but depending on what and how often she is eating it could be different. A mouser would be likely be smaller than one on rats.