Most often, this applies to office chairs where people spend hours sitting. However, any chair that you spend time in should be ergonomically appropriate. To start, test out all chairs you’re considering for purchase — your body will innately know whether it’s right for you or not. If it feels good, check out the back support, particularly for kitchen or dining room chairs that are generally more upright. The lower portion should provide support while being slightly curved to follow the contour of your spine.

As for the seat, it should feel comfortable when you first sit down and stay that way for several hours. There should be at least an inch of space between your body and the sides of the chair to allow for some movement. If you’re looking for a chair with arms, make sure their height is proportionate to your body. If they’re too high, you’ll have trouble relaxing your shoulders while your arms are resting.