yes, this is very small, even if you do allow it roaming time, i have a 8" in baby and he is in a larger tank, if you even do allow it to roam the minimum size would be 48Lx24"Wx28"H, you should do your research before getting any animal, especially such a large lizard.
if you have any questions I would be glad to answer them, also does he/she have full spectrum, because that tiny light doesn't look like one, but I could be wrong, also if that is he also needs a basking spot and I don't see one.