The Fennec fox is the smallest of all dog types and has very large ears. Its head-hull length is 333-395mm, the tail is 125-250mm long. His birth weight is between 80 and 187g, the weight of adult animals 1.0 to 1.5kg. The ears make up 20% of the body surface and are 86-104mm long. This means that they are proportionately larger than in all other dogs.