My rat snake is about the same size and I was told he is about 1 year. However he came from a bad pet store so I really don't know how accurate they are.

I got my leucistic (Texas?) rat snake in April of last year when it was about 18 inches long. The girl I got it from said she bought it at the reptile show that February.... Any idea how old it was at 18 inches? Now it's about 31". If you have any other Luecistic info I would really appreciate it. Thanks.