How high is a hurdle?

For the men's 110 meter hurdle race the hurdles are 3 feet, 6 inches (1.067 meters) in height. For the men's 400 meter hurdle race the hurdles are 3 feet (91.4 centimeters) in height. For the women's 400 meter hurdle race the hurdles are 2 feet, 6 inches (76.2 centimeters) in height.