I had this long, beautiful response all written out for you... and then internet connection is lost and it disappears! ARGGGG!

*slams head on desk*

Anyway, here're a couple of pics for size comparison, anyway: This is a three foot, full grown female BP and a six foot, full grown female Columbian BCI:





I would write more, but I don't want to further irritate my frustrations with the internet connection here.

Let's just say this: I love my boas. They are amazing snakes to own. You need to stay aware when handling them, but you need to stay aware when handling any snake. They are quite curious and will get into anything they can, so you have to keep your eye on them.

As for feeding: unless they're sick, boas will eat whenever you put food in front of them (some will have amazing feed responses... they will get into a routine, and will strike on feeding day. They're not trying to be mean, they're just hungry!). I feed my babies one appropriately sized meal every week. At about a year, I move it back to two weeks. There are others that feed once a week the entirety of the snake's life, and there are others that feed once every two weeks from birth. When they're small, they burn off that food through growth... but boas do have a tendency for obesity as they age and stop growing so quickly.

Hope this helps!