I bought this case before I got my nano to completely eliminate the risk of damage. Unlike silicone cases, that, while only adding 2mm or so to the size, provide little protection, this provides complete protection (enough, in fact, to safely put the nano in a pocket). It covers every part of your iPod, apart from the headphone jack, the hold switch, and two gaps opposite. None of these gaps are anywhere near big enough to allow any damage.
The case is small, and has the big advantage of covering the click wheel – and leaving no need for hold to be used, hence saving a lot of battery.
This cases is a Godsend – well done Belkin!!!