It's incredibly tiny, with an average weight of just 2 grams (about the same as a dime!) and a body length of only 2.9 to 3.3 centimeters (1.1 to 1.3 inches). It's even smaller than the smallest bird, the bee hummingbird.
What size is the smallest mammal?
The smallest mammal in the world is the bumblebee bat (Craseonycteris thonglongyai), also known as the Kitti's hog-nosed bat.