Do some research. Seriously it will help. Yes some of those she listed are under 5 feet. Also one thread would have been enough.
Colombian boas are popular because they're calmer than the small species. Alicia I would not be recommending some of those boas, but to each their own. I keep Nicaraguans, and they're very active in hand, and don't take kindly to being told where they're supposed to go.