Tank size and what is classified as a juvenile corn?

Hi y'all,

I can't believe it's almost been a year since getting my corn snake. I believe he is already about 9 months old (bought him at an expo in late September, so give or take 3 weeks old when I bought him). What age would he be considered a juvenile? Also, I just measured him, and he's about 22 inches long, which is about as long as the diagonal length in his enclosure. I have him in a 10 gallon enclosure. I did research a while back that once the length of your corn matches or is more than the length of the tank diagonally, then it's time to upgrade. I just wanted to get y'all's thoughts and advice on this topic. I apologize in advance if this has already been answered or in an existing thread. Thank you?

I'm not sure the exact cut off for what is considered a juvenile, but probably a year and under? One to two years would be subadult and then three and over would be an adult. I would probably move him to a larger enclosure by a year old, since a ten gallon is pretty small. The metric I've seen referenced most often is length plus width of the tank should be longer than your snake. Moving him to a larger enclosure earlier won't be a problem either, as long as he has lots of places to hide and ground cover.

The general usage of terms for corns that I have seen is neonate for the baby-babies, hatchling, then yearling, then juvenile, then adult.

I just moved my one year old into a 30x12x16 zoo med terrarium from a 10 gallon. He is definitely appreciating the extra space. And I love the front opening doors. They make things so much easier than having to reach in from the top.

my Bella is 4 months old that juvenile up to a year correct?