I've bought myself a new clip in pony tail, and thought I'd show you a quick look with it.
It is slightly too dark currently, but my hair is too light at the moment, but after being red for two days it needs some layering up of the darker tones again. It will match perfectly soon!
It isn't just for length, but for the sleekness. I love pony tails, but they can look scruffy or lazy. What makes them a definite style is a sleek or curly finish - as if it's been blowdried. The clip in pony provides a quick way of looking a little more polished.