Average Length of Great White Shark
The average length of an adult great white shark is typically 11 to 15 feet (3.4 to 4.6 meters), with mature females often reaching the upper end of that range. Verified records from recent studies and museum specimens show that most adults fall within this band, while exceptional individuals can exceed 20 feet (6.1 meters) Forbes.
Average length estimates are based on tagged and measured specimens collected by marine research programs and published in peer-reviewed journals. These figures represent central tendency values, not maximum sizes, and they vary slightly by ocean basin and population NOAA Fisheries.
Size Variation by Sex and Age
Male great white sharks average 11 to 13 feet (3.4 to 4.0 meters), while females average 15 to 16 feet (4.6 to 4.9 meters), reflecting sexual dimorphism in length and body mass. Juveniles start at around 4 to 5 feet (1.2 to 1.5 meters) at birth and grow steadily during the first decade of life.
Growth rates slow after sexual maturity, which occurs at about 9 to 10 years for males and 14 to 15 years for females. Long-term tagging data from programs such as those linked by Ocearch help refine these averages with direct measurements.
Record Sizes and Verified Measurements
The largest reliably measured great white shark was a female estimated at about 20 feet (6.1 meters), based on photogrammetry and comparison with known reference objects. Other historical claims of larger individuals remain unverified or rely on indirect methods such as jaw width and tooth size.
Scientific databases and recent global surveys continue to update the verified maximum and average length records. The latest published compilations emphasize measurements from live-tagged sharks and stranding networks, reducing reliance on anecdotal reports Shark Trust.