snake age and sex
As I have recently learned, it is pretty hard to tell how old your snake is by size. I have a little ghost corn born in august of '03 who is only 9 inches long, where as I have seen others who were born around the same time who were up to 15inches. You might want to call the pet shop and see if you can ask one of their reptile people, most the pet shops around here keep track of the snakes eating and can at least trace back how long they have had the snake.
As for sexing either call a pet store and see if they have an experience person who knows how to sex or see if you can find an exotic vet in your area who knows how. Its a pretty simple procedure that takes just a few minutes (but it could definitely be harmful to your snake if the person sexing doesnt have a clue).
Good Luck :cheers: