The spectacled caiman is a small to medium-sized crocodilian. Females generally grow to no more than 1.08 to 1.4 m (3.5 to 4.6 ft) (the lower size typical upon the onset of sexual maturity), but can rarely grow to nearly 2 m (6.6 ft). Adult males can regularly reach 1.5 to 1.8 m (4.9 to 5.9 ft) while large mature ones grow to 2.0 to 2.5 m (6.6 to 8.2 ft), although relatively few get to the upper size.[9] The maximum reported size for the species is 2.64 m (8.7 ft).[10] The body mass of most adults is between 7 and 40 kg (15 and 88 lb), with males typically being considerably heavier than females.