A lot of them can get quite tall if you don't prune them back, I had a red 7 pod that grew over 6 feet tall in the ground and some others that grew almost as large in a 2 gallon bucket. A Naga Morich pepper plant can get quite tall and have a great many pods on them.
I usually just let them grow like they want too with some support to keep the branches from breaking under the weight of the pods, rather than prune them as they often will have fewer but much larger pods that way, when you prune them you often get more pods, but a lot of the pods will sometimes be smaller than what they might be if just left alone.