So I made the leap into boas

[Evenstar]

I have three BRB's, 1.1 adults and 1.0 who is about 18 months old. The adults are both just shy of six feet, and the female is thicker than the male. None of them are at all nippy, though youngsters can be until they get used to being handled. Ours are all curious and much more 'social' than the BP's. The hardest part about keeping them is maintaining that 80% or higher humidity (90% for the very young), so an appropriate enclosure is vital - don't even consider a tank. Also they're less tolerant of high heat, with temperatures over 86*F being deadly long term if they can't move away from it. I keep my hot side at 84*F and the cool side at 75*F and I very rarely see mine on the hot side.

^^^ This. The Brazilians do tend to get larger than the Colombians.

In the past 20 years I have personally seen several bci in the 8'+ range. Not many but a few. I have also seen one extraordinary female bci that was well over 10'. It's doesnt happen often but it can happen. So IMO it should be something that anyone buying a boa should be aware of. Always best to be prepared.

Oh I know it's possible for BCI to occasionally get HUGE. There are certainly exceptions to every rule. And you are correct that anyone wanting a boa should be aware of the possibilities. But having said that, there are things one can consider to help minimize the chances of having a that boa grows HUGE: Certain localities stay smaller, males tend to be smaller, etc. Actually, Colombian females will readily attain lengths of 8-ish feet so that isn't rare at all. But it IS rare for males and Nicaraguan, Sonoran, or the Insular localities to get anywhere near that mark. And Tarahumara Mountain boas almost never get over 5 feet. All of these are BCI. But your point is well taken!