Even if we could verify the claim, what's the point? The world's smallest mouse is likely to be as useful as the world's smallest keyboard. The Z-Nano USB mouse measures 42 x 21 x 17.65-mm and, amazingly, includes itty bitty left- and right-click and up- and down-scroll buttons. Available now for $60. See it in action after the break.

[Via BBGadgets]