The height of hurdles in the Olympics varies by event and gender:

• In men's sprint hurdle races (like the 110m hurdles), the hurdles are 106.7 cm (42 inches) high.
• In women's sprint hurdle races (such as the 100m hurdles), the hurdles are 83.8 cm (33 inches) high.
• In long hurdle races like the 400m hurdles, men's hurdles are 91.4 cm (36 inches) high, while women's hurdles are 76.2 cm (30 inches) high.

These heights are standardized for Olympic competition with specific spacing for each event, for example, in the men's 110m hurdles, the first hurdle is 13.72 meters from the start, and the hurdles are spaced 9.14 meters apart.