Blyth's flying foxes have dark brown to black fur, except in the chest and neck region where the fur is light brown. The genus Pteropus includes the largest bat species in the world. No records of body measurements could be found in the literature. Males of Pteropus species tend to be larger than females and species range in size from 170 to 406 mm in body length and 610 to 1,700 mm wingspan.