Schreber's yellow bat is a large, robust bat, the largest vesper bat in Africa. It has a head-and-body length of about 190 mm (7 in), a tail length of 80 mm (3 in) and a fore-arm length of about 80 mm (3.1 in), females tending to have slightly longer forearms than males. The canines are well-developed, the upper jaw has a single incisor and four cheek teeth on each side, and the lower jaws have no incisors and five cheek teeth.