The maximum length for this species is 3.3 metres (10 feet). Males mature at the lengths of 2.2-2.3 metres (9-10 years of age) and grow to a lesser size than females, which reach maturity at the lengths 2.3-2.5 metres (12 years of age), however, these numbers are different among the different populations of this species. Silky sharks weigh around 350 kilograms (770 pounds). 