He could easily live in an 11 gallon rubbermaid (er...I think it is now 13 gallons or something since I think they discontinured that and it now has a "hi-top"), if you wanted to decorate or just wanted something larger you could also go to something slightly larger like the sterilite underbed units (they are about 32"x12" I think???). Like Big Mike mentioned, both models can be found at Crappy Tire and Wal-Mart