- The largest macaque is the northern pig-tailed macaque (_Macaca leonina_), which can reach a body length of up to 65 cm (26 in) and weigh up to 20 kg (44 lb).
- The smallest macaque is the crab-eating macaque (_Macaca fascicularis_), which has a body length of about 50 cm (20 in) and weighs up to 6 kg (13 lb).