The World Record of “smallest optical mouse” has been achieved by Cyber Inc Pvt. Ltd. of Singapore.

As on Jan 10, 2008; ‘Z-Nano Mouse’ the smallest optical mouse manufactured by Cyber Inc Pvt. Ltd., measured 42.5 mm (1.67 in) long, 20.5 mm (0.81 in) wide and 17.6 mm (0.69 in) thick.