Burm and Retic Cages Size?

[mainbutter]

A good rule is for every foot of snake, you should have a square foot of floor space. 6X3 is good for an animal up to 18 feet...

That implies that 18x1 would be suitable for an 18 foot snake.

I highly disagree with this 'rule of thumb', ESPECIALLY when it comes to big snakes.

Could you imagine a theoretical 30 footer in a 10x3?

The supposed "square foot of cage = foot length of snake" really is just a suggestion for, say, corn snakes.