I have a 4 ft. 1500 gram male who is housed in a sterilite 1960 (41 qt.) and he seems to be doing just fine. He stretches plenty, but for the most part he travels back and forth between his two hides and it seems the lack of height is not an issue. I also use binder clips to secure the lid. The ones Becky recommended are pretty close to the dimesions of mine. All three are inexpensive ($7 - $10 approx.).