my green stays small-, but I've got like a maroon or salmon color-it's got at least a 12'' spread--but like harleyguy said, they're prob. gonna move, so you just need to put him in (but go ahead and place him where you want him, who knows, he might stay), and adjust everything else around him---and he may even move again; my GBTA moved about 5 times before finding his current home, and hasn't moved for a while now