As the saying goes, "don't judge a book by it's cover." If I had bought Blake with the thought that he was going to continue to have the attitude that he had, I might not have bought him. He was quite the little terror. But now he's a total sweet heart. I let him out loose in the apartment and don't have to worry about being able to catch him again.
They do stay relatively "small." About 3.5'-4'. They don't get really bulky. At just around 3' Blake weighed a little over a pound and a half and the vet said that he was definitely healthy looking. Of course is still growing. But he's really mellowed out. Especially with age.
As an example, this will be his second year participating in an animal costume contest. I also had him as part of my wedding procession. Not things that you would do with a mean and unpredictable animal. However, I do caution you that it took a lot of time and effort on my part to get him there. I still handle him on a daily basis even if it's only to take him out of his enclosure to go to the bathroom.
They still need a lot of room though. They're really active lizards and Blake is all over his enclosure when he's awake (6.5'x3.5'x4', it has two upper levels that he loves to climb up onto). I still think that he needs a larger enclosure, but this will do for the time being.
Hope that helps you. I absolutely love colombians because of Blake. But they are a bit of work.
Lindsay