Complex sentence: Adult males are much larger than the females and can reach three feet (92 cm) in length at maturity and continue to grow to lengths of 4-4.5 feet (120 to 140 cm).
Split into simpler sentences: Adult males are much larger than the females and can reach 3 feet (92 cm) in length at maturity. They may continue to grow to lengths of 4--4.5 feet (120 to 140 cm).