It sounds like the pro series chains are the best option available, so I think that's settled, but I'm not sure about the pros and cons of monkey first vs cathedral vs whatever.
Also, I don't know what length of chain to get for her. I see that it should be the length of her arm to where the thumb joins the hand, that's great, but I don't want to have to measure her arm as that might arouse suspicions..
Can anyone give me an educated guess as to the right length of chain for her given that she is 5'2" ? I'm guessing medium to small?