To give an idea about this perfect length, I am 5'10" and slim build. With this just around my neck my camera can act like a fig leaf, as it hangs right down there. So think of this a modesty strap if you happen to be on a nudist beach, taking pics of, erm, wildlife.
The bigger your gut and/or the taller you are, the higher up your body the camera will be.
If you hang your camera across the neck and one shoulder so it dangles on your side - the way all us pros do - then it will sit a little higher. And perhaps you get a kick out of that gunslinger look?
RolleiCo mentioned using it as a jump rope. A good idea but please first remove the camera. I don't want to hear stories about broken M7s.