Ergonomic office chairs come in a variety of heights, but the ideal height is dependent on your body type and how you use your chair. For most people, the ideal height is between 18 inches and 24 inches. The closer to 18 inches, the more comfortable you'll be because it's close to the ground. If you're taller than 24 inches, choose a chair that has a higher back, like 26 or 28 inches.