There's a bit of confusion about B's height mostly because in Chapter One she was shown at the same height as Sophia - I only did this so the "Mortal Kombat" joke could work, though. >_>
B is 6'2", Sophia is around 5'8" and Rain roughly 5'6". Tara is an even 5'0".
I admit, however, that I will grow or shrink the models to make certain shots look right, so most of those numbers aren't set in stone. Just chalk it up to Kylie being an unreliable narrator!