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[mhartmann]

Just about every care sheet and manuel for keeping captive boas will say that boas will grow to their maximum possible sizes, so they say the adult size will be 10 ft for a columbian boa, etc. There's good reason for this as so many people give their snakes away when they get 'too' big, and many snakes then can't find homes, it's terrible. But truth be told, there may exist one male columbian boa in all the world that makes it to 10 feet. That's huge for the size. I'd put money on it that your male boa will not grow much larger (although all boas continue to grow throughout their lives, this is in really small amounts). I imagine your boa will probably grow another 6 inches in the next 10 years. Of course i could be wrong, but if you look at statistics, the average adult male columbian boa is between 5 and 6 ft. And I might err on the smaller size for you taking into consideration the number of owers which means there's a high probability of not optimal care during that time (they grow differently according to feeding and temperature regiments etc.) So your cage sounds big for him, but then he'll probably be the happiest boa in all the land with the care you're putting into it. But it might be a good idea to make the hiding spots removable so you can change sizes if you need to, for ease of cleaning, and to better get at your boa for handling times. My two cents.