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The American is one of the larger crocodile species. Males can reach lengths of 6.1 m (20 ft), weighing up to 907 kg (2,000 lb). On average, mature males are more in the range of 4.1 m (13 ft) to 4.8 m (16 ft) in length weighing about 400 kg (880 lb). As with other crocodile species, females are smaller; rarely exceeding 3.8 m (12 ft) in length.
Males typically weigh between 1,800 and 2,000 pounds, with about 600 pounds of that from their necks. Part of that weight comes from the seven vertebrae, which is the same number of vertebrae humans have in their necks. Giraffes' are much bigger, obviously, about 10 inches long.