Well, I think a lot of people think that too big is better then too small and so have a tendency to recommend something too large. However I think the numbers they have listed for 'recommended' sizes are way too big. A room sized enclosure for a boa constrictor? 125 gallon aquarium for a ball python? 75 gallon aquariums for corn and king snakes? The snakes would get lost in something that size. Their 'minimum' sizes are what I would think of as recommended for Adults but they're still far too large for babys and subadults of those species. I don't care what kind of range they are said to have in the wild, we aren't keeping them in the wild. They're captives and we supply all their needs. If snakes don't have to travel to find food and water and shelter, then they don't.