Hurdles heights vary depending on the race distance, age, and sex of the athletes:

• For men's 110m hurdles, the height is 106.7 cm (42 inches).
• Women's 100m hurdles have hurdles at 83.8 cm (33 inches).
• For men's 400m hurdles, the height is 91.44 cm (36 inches).
• Women's 400m hurdles are 76.2 cm (30 inches).
• Youth and older athletes may have lower hurdle heights, ranging down to about 68.6 cm (27 inches).

The heights range roughly from 68 cm to 107 cm depending on the category and event, with the tallest hurdles in men's sprint hurdles and shorter hurdles for women's and youth events.