Don't buy this armband if you plan on using it in the pool.  The strap doesn't use velcro-on-velcro to secure, it uses velcro-on-fabric.  When that fabric gets wet the armband won't stay fastened.  Might be good for dry use, but it was a waste of money since I intended to use this for swimming.

I am a petite woman and although the armband is great, I have to wear it close under my arm because my arm is pretty thin, and when I tighten the stap all the way, it goes around my MP3 and it has to be secured with a safety pin otherwise the velcro does not hold it in place.

The armband and extra headphones have been great.  It is nice to have an extra set of headphones to use in case my current ones stop working.  Also the arm band is great for working out outside of the pool and the pouch is useful for holding keys and money.