While the average size of hammerhead sharks is 8 to 12 feet and 300 to 550lb, they can reach a maximum size of about 16 to 18 feet and 1,300lb. Female hammerheads tend to grow larger than males and can outgrow them by several feet.
While the average size of tiger sharks is between 8 and 12 feet and 500 to 1,000lb, these predatory fish can reach a maximum length of 18 feet and an approximate maximum weight of 2,000lb.
While their actual maximum size remains a mystery, the largest great white sharks known today have a maximum size of about 20 feet and 5,000 pounds. Their average size is between 10 and 16 feet and 1,000 and 2,500 pounds.