Kitti 's hog-nosed bat is about 29 to 33 mm ( 1.1 to 1.3 in ) in length and 2 g ( 0.071 oz ) in mass , hence the common name of `` bumblebee bat '' .
The Bumblebee bat is about 29-33 millimetres ( 1.14-1 .30 in ) in length and 2 grams ( 0.07 oz ) in mass ) .