Depends.
BCI's are generally 5 to 8 feet depending on the sex of the animal and BCC's are generally more on the order of 7 to 11 feet depending on the sex of the animal. What it really comes down to with boa's is locality. Those sizes are very general. You might get a giant BCI or a really small BCC. If you are just going to buy one from a petstore, more than likely its a Columbian BCI.
Moved to the RedTail Forum.