How Big of a tank for Full Grown BP?

I have a beautiful BP, born October of 2005. She is great! When we bought her from the breader I said I wanted to purchase the tank that would be big enough when she is full grown. He said a 20 gallon is big enough. Is this what you have all found as well for a full grown BP? We go into his store all the time for weekly rat meals and just to look around at all the great reptiles. I've handled the full grown BP's and they just seem like they'd be more comfortable in a larger enclosure.

Please let me know what you've found.

Are you sure its a female? Only reason i ask is because males will do fine in a 20 gallon long (30x12x12) for life, with the exception of the random huge males like Gin (anyone know where she went??) has. A fully grown female will be comfortable housed in a 40 gallon breeder (36x18x18).

Elevatethis got it right on the money!!! If its a boy, give it a toy...If it's a girl, give her a bigger tank!!!

Thank you so much. I will have to have her sexed by the breeder to be honest. I had a guy who owns snakes tell me it was a girl but he didn't probe or anything. In this case let's hope it's a boy!!!