Office Chair Size Diagram

The size design of office chairs should combine ergonomics with usage scenarios. Here are some common key dimensions and selection suggestions:

1. Seat height (vertical height from the ground to the seat surface) The standard seat height range for office chairs is 40-50 centimeters, which should be adjusted according to the user's height. For example:

• For those who are 160 centimeters tall, it is recommended to adjust the seat height to 42-43 centimeters to ensure that both feet are flat on the ground and the thighs are parallel to the ground.
• For those who are 165 centimeters tall, a seat height of 43-45 centimeters is suitable to avoid leg suspension or compression.
• For those who are 170 centimeters tall, the optimal seat height is 45-47 centimeters to maintain the natural curve of the spine. Some high-end office chairs support pneumatic height adjustment to accommodate different height requirements.

2. Seat depth (horizontal distance from the front edge of the seat surface to the backrest) Seat depth directly affects leg comfort and is usually 40-45 centimeters. When choosing, ensure that:

• After sitting down, there is a 2-3 finger-width gap between the back of the knee and the front edge of the seat surface to avoid compressing blood vessels.
• When the back is fully against the backrest, the buttocks can still receive stable support. If the seat depth is too long, it can be compensated for with a lumbar support or by adjusting the sitting posture; if it is too short, a larger-sized seat should be replaced.

3. Backrest height and tilt angle

• Backrest height: The backrest height of ordinary office chairs is 50-60 centimeters, covering the lumbar region to the scapula area; high-end models may extend to over 70 centimeters to provide neck support.
• Tilt angle: It is recommended to have an adjustable range of 95°-120°, with 100°-110° being the optimal working angle, which can disperse back pressure and avoid excessive reclining that affects efficiency.

4. Armrest height and width

• Armrest height: It should be consistent with the height when the elbows hang naturally (about 20-25 centimeters), ensuring that the elbows are bent at 90°-100° when the arms are relaxed, reducing shoulder and neck fatigue.
• Armrest width: It should match the shoulder width, usually 45-50 centimeters, to avoid restricting movement if too narrow or squeezing the body if too wide.

5. Other key dimensions

• Chair wheel diameter: For ordinary carpet environments, it is recommended to choose 5-centimeter hard wheels; for hard floors, 7.5-centimeter soft wheels can be selected to ensure smooth movement and protect the floor.
• Chair leg span: For five-claw chair legs, a span of 60-70 centimeters is recommended to provide stable support and avoid the risk of tipping over.

Purchase suggestions: Prioritize office chairs that support multi-dimensional adjustments (seat height, backrest, armrests) and try sitting to confirm the size match. If trying sitting is not possible, refer to the above standards and choose according to your own height and body shape, or consult the merchant for specific product size parameters.