Colombian Boa are NOT common Boa. This I think is where the confusion lies. Too many common BCi are wrongfully called Colombian, and too many Colombian are wrongfully called common Boa. It's too the point now where everyone has a Colombian, even if it looks like a Hog Island Boa. Heck, people call Salmons Colombian Boa, and they are of mixed blood, just as over half the market is.
Fact is, a real Colombian Boa can reach decent proportions. Even a male can get 7-8 ft and probably 30# plus. This is a fact that I've witnessed a few times in my life. Take it or leave it.
to the OP.....You can always go with Trpidphiidae, the TRUE dwarf Boas, if size is that big of a concern. I guarantee they will stay small, but may be a challenge to keep successfully.
Rick
