The pig-tailed langur is a large, rather heavily built Old World monkey

Old World monkey

The Old World monkeys or Cercopithecidae are a group of primates, falling in the superfamily Cercopithecoidea in the clade Catarrhini. The Old World monkeys are native to Africa and Asia today, inhabiting a range of environments from tropical rain forest to savanna, shrubland and mountainous...

, which is adapted to climbing with its long arms. Its fur is black-brown, and its hairless face is also black. It is the only monkey in the subfamily Colobinae

Colobinae

Colobinae is a subfamily of the Old World monkey family that includes 59 species in 10 genera, including the skunk-like black-and-white colobus, the large-nosed proboscis monkey, and the gray langurs. Some classifications split the colobine monkeys into two tribes, while others split them into...

 to have a relatively short tail; the tail is only slightly furred and is only 15 cm long. The short nose is pointed upward. The pig-tailed langur reaches a full grown length of approximately 50 cm and a weight of 7 kg.