The grey wolf is the largest of all the wild dogs.
Females are usually smaller than males.
The length of the head and body ranges from 100 to 120 cm. The tail varies from 30 cm to as long as 50 cm. Small wolves stand about 65 cm at the shoulder, while the largest reach 95 cm. Small females weigh 27 kg or less, while a large male can reach a weight of 45 to 80 kg. The known record weight for a wolf is 89.5 kilograms.