The increasing popularity of mini-ITX cases has led to a somewhat downsizing trend by manufacturers. And we mean that in the most literal sense - many companies are now releasing smaller mITX versions of their full-size line instead of redesigning from the ground up for the smaller board size. The Fractal Design Define Nano S is one such case, a miniaturized version of the Define S. Let's take a look at how this small case measures up.