The World Record of ‘smallest rodent’ has been achieved by the Baluchistan pygmy jerboa (Salpingotulus michaelis) from Pakistan.

The Baluchistan pygmy jerboa, or the dwarf three-toed jerboa is the only species in the genus Salpingotulus. Adults average only 4.4 cm (1.7 in) in head and body length, with the tail averaging 8 cm (3.1 in). Adult females weigh 3.75 g (0.132 oz).