Males are larger than females. Males can grow up to 2 m (6.5 ft) long. Males can also weigh 133 kg (293 lb). Females can grow up to 1.4 m (4.6 ft) long. Females can weight 34 kg (74.9 lb). At birth, the average length is 67.4 cm (58–66). The average weight for young ones is 5.9 kg (4.9–6.6) in males and 5.4 kg (4.8–5.9) in females.