Tank size/ snake size?

My BP is 5.5 months old and around 23 inches long. I have her in a 20 gallon tank. I saw a really nice 40 gallon long tank for sale, I was wondering if this would be to big for her or stress her out ....any advice would be Great.

I always think the bigger the better, so long as you have enough appropriate hides in the tank for him/her. I move up in tank size whenever I can afford it.

Might as well take the deal on the cage now if you can. I wouldn't move up in cage size until your bp breaks 3 feet though. But that will be in just a couple of months anyway, so you can spend that time getting cool stuff for the new enclosure!

Thanks Alice, I might just grab that tank while its still on sale.

Will a 40 gallon long be large enough for when she's all grown up??

Yes, unless she reaches an unusually large size.