The smalleye hammerhead shark is a small member of the hammerhead shark group, reaching up to the length of 1.5 meters (4.9 ft) long, but ones which are 1.2-1.3 meters (3.9-4.3 ft) long are more common. They weigh around 9 kg. The cephalofoil is wide and long, measuring up to 28-32% of the body length. The eyes, which are placed at the ends of the cephalofoil, are smaller than the eyes of other hammerhead sharks and have a third eyelid. The nostrils are placed inside the eyes.