for reference....i have a little 8 month rescue sav. he is roughly 10 inches and just getting healthy. he is small, but his enclosure is a 75 gallon with a custom hood made to keep humditity in. once he reaches at least 12-15 inches and get a little meatier, he will transfer to the 6x4x3 cage i have sitting for him. these guys get big, and they are pretty sensitive to there enviroment. so to take him from the pet store the way he is, or even fatter, and throw him in a small cramped enviroment, he will just become stressed, probably want to bite you to death, and more then likely wont eat. if the husbandry isnt good with these lizards, then they will die fairly fast. my little guy is the 4th savanna i have owned, and he is small but still has a foot of substrate to burrow in because they love to do it.