You stated you bought the snake last Oct/Nov, you could assume it was born last year, BUT that is not a clear indication either. It could have been a small yearling. As 'desertaimal' said size is not an indication of age I have two 2005 and two 2006 and there is no comparison in size. One of my 2005 I boutght Fed, 2006 but knew it was a little big for a 2006. This snake is a Creamsicle so a little bigger than usual for a corn/hybrid, but this year he did a huge growth spurt and now I'm thinking he may be an 2004. What I'm trying to say is if your RO sheds regularly, eats well, you might be able to compare it to other snakes from people who no the age, more to the point you will have to judge for yourself.