Height adjustment is one of the most underrated features on an office chair — it gets far less attention than lumbar support or padding, but getting it wrong quietly undermines almost every other good feature the chair has, no matter how well-designed the rest of it is.

Here's why it matters so much. If your chair sits too low, your knees end up higher than your hips, which tilts your pelvis backward and flattens your lower spine's natural curve — the exact posture that causes lower back strain, even in a chair with excellent lumbar support, because the support simply isn't reaching the right part of your back at that angle. If it sits too high, your feet lose contact with the floor, which reduces circulation in your legs over long sitting sessions and often pushes you to slouch forward to compensate, defeating the purpose of the adjustment entirely.

✅ How to find the right height:

- Sit with your feet flat on the floor and check that your knees form roughly a 90° angle, level with or very slightly below your hips.
- Your desk should meet your forearms at roughly elbow height when typing — if the desk height is fixed, you may need to adjust the chair around it rather than the other way around, which sometimes means using a footrest to compensate.
- If your feet don't reach the floor even at the lowest chair setting, a footrest is a better fix than sitting too high just to reach the ground, since it preserves the correct elbow and shoulder alignment relative to the desk.

Most quality office chairs in Bangladesh use a gas-lift mechanism with a wide adjustment range, which is one of the reasons it's worth buying from a proper Ergonomic Chair line rather than a fixed-height chair repurposed as a desk chair. A smooth, reliable gas lift also tends to be one of the first things that fails on very cheap chairs, so it's worth checking this specifically rather than assuming all chairs handle it the same way — a lift that slowly sinks through the day is one of the most common early failure signs on budget chairs.

It's also worth checking the gas lift's smoothness specifically when testing a chair before or shortly after purchase — a lift that requires noticeable force to adjust, or that drifts down slowly under weight, usually signals a lower-quality mechanism that's likely to fail sooner rather than later, even if everything else about the chair feels fine initially.

It's worth revisiting your height setting periodically too, especially after switching desks or if you've noticed new discomfort — small drifts in adjustment happen naturally over months of use and are easy to correct once you know what to check.

For the full posture picture beyond just height, our How to Sit Correctly guide covers the rest of the setup.

🛒 Browse the full Ergonomic Chair collection or see our complete range from the Furniture Plus homepage, with a 1-year warranty and fast delivery across Bangladesh.