How old would a 3-4in Veiled cham be?
What size cage would it need to start with?
What temps and humidity?
What kind of vitamin/calcium schedule should it be on?
How much should it eat a day(crickets)?
It's not very easy to determine a chameleon's age simply by their size - they often grow at different rates.
Suffice to say that a chameleon that small is still a baby.
bg77
There is a search option on this forum.
Enter the topic you want to learn about and more info than you can imagine
will appear for you.
All of these basic questions have been answered over and over...you just need to review the old threads.