The problem is, there are sooo many groups, species, sub species.
My understanding is that the Common BCI male USUALLY will get up to 6 ft, maybe 7. Females closer to the 8-9 range. Of course there are exceptions and feedind amounts and frequency will relate to size.
BCC's tend to get bigger, as well as certain locales.
Chances are someone will come along and with different/adjusted info.