Saltie size comparison. Saltwater Crocodiles show extreme sexual dimorphism. Females mature at 2.2–2.5 m (about 10–12 years old), while males mature at around 3.3 m (around 16 years old), with males growing faster and reaching far larger adult sizes. Anatomical studies also show males trend broader in head/skull and overall proportions. In crocs, C. porosus (Salties) have some of the strongest size dimorphism recorded. Male maturity size is 46% larger than female maturity size.  In Australia, f