Size does matters. But small gadgets are always preferred over the large one. This is basically because it is convenient to carry them, easy to handle etc. This 8GB flash drive just looks small but is actually very terrible.

Features:
As smallest in the world as the size of a coin
Comes in three models-swiveling one, a retractable one, and a plain old stick figure looking regular flash drive

It will cost you around $35 each