Smallest optical mouse

The smallest optical mouse is th Z-Nano Mouse manufactured by CyberInc Pte Ltd (Singapore). It measures 42.5 mm (1.67 in) long, 20.5 mm (0.81 in) wide and 17.6 mm (0.69 in) thick and has all functionalities of a regular mouse. It was presented and measured in Singapore, on 10 January 2008.