Need some answers...please

I just got a new RTB but I have a couple questions:

At what age are they considered "adult"??

At what age do they normally reach their full length/Weight??

Thank you.

I call adult boas, boas that are sexually mature.

Boas usually hit their "optimum" size and weight around 4 years old for females and 3 years old for males. Notice I didn't say "full". Snakes never stop growing until they die. Their growth rate just slows down to turtle speed when they "peak" so-to-speak.

Thanks for your help.