I have a 60 gallon... And I looked up sizes and saw a 55 gallon at the dimensions I listed above. Got it right off the site selling em. Also I think some of you are missing the fact that I plan on getting my Tegu as a hatchling and only using that tank for 3 or 4 months. Also from cruising the forums I saw that people have about the same size tank as me and are doing fine for the little guys. I would never keep him in there so long he outgrows it.