The smallest is the talapoin , with a head and body 34-37 cm in length , and weighing between 0.7 and 1.3 kilograms , while the largest is the male mandrill ( the females of the species being significantly smaller ) , at around 70 cm in length , and weighing up to 50 kilograms .
The smallest is the talapoin , with a head and body 34-37 cm in length , and weighing between 0.7 and 1.3 kilograms , while the largest is the male mandrill at around 70 cm in length , and weighing up to 50 kilograms ( the females are much smaller ) .