With all the vines and considering this is likely a pet snake and not in a racking system why not just go for a 41 qt. Personally I prefer the Iris brand as they are almost glass clear. You'll get a better viewing experience and with all that cover your snake shouldn't feel overly exposed to the world.

I use a number of these tubs in a racking system for breeding size female ball pythons so if you need dimensions, don't hesitate to ask.