Office Chair Size Selection

When selecting an office chair size, it is essential to focus on core parameters such as seat height, seat cushion, backrest, and armrests, and adapt them based on ergonomic principles and actual usage scenarios.

1. Seat Height Range
Opt for models with adjustable seat heights, with a recommended adjustment range of 38 to 50 centimeters to accommodate individuals between 160 and 190 centimeters tall. Ensure that when adjusting, both feet can rest flat on the ground with knees bent at a natural 90-degree angle, avoiding leg suspension due to excessive height or thigh compression due to insufficient height. If choosing a fixed-height model, the standard height is typically 40 to 45 centimeters, requiring careful evaluation based on one's own height.

2. Seat Cushion Dimensions

• Width: Use the width of the shoulders when arms are hanging naturally as a reference to ensure unrestricted arm movement.
• Seat Depth: It is advisable to select a seat depth of 38 to 45 centimeters, allowing the thighs to fully conform to the seat surface without compressing the back of the knees. Individuals of shorter stature (e.g., those under 165 centimeters tall) may prioritize seat depths under 42 centimeters to prevent lumbar suspension.

3. Backrest Height

• Lumbar Support: The backrest height of a standard office chair should reach at least 40 centimeters to ensure coverage of the lumbar region and reduce fatigue from prolonged sitting.
• Overall Height: The total backrest height is recommended to be 52 to 65 centimeters, matching the shoulder height in a sitting position to provide complete support from the neck to the waist. For those requiring prolonged desk work, models with adjustable headrests can be chosen to further support the cervical spine.

4. Armrest Height
The recommended armrest height is 20 to 25 centimeters, adjusted to be level with or slightly lower than the desktop to allow the shoulders to hang naturally and the elbows to be supported, preventing shoulder and neck pain caused by suspension. Prioritize armrests that can be adjusted in multiple directions (up and down, forward and backward, rotation) to accommodate different office scenarios (e.g., typing, reading).

5. Adjustment Functions and Safety

• Seat Depth Adjustment: Choose models that allow for a 5-centimeter forward and backward slide to accommodate individuals with different leg lengths.
• Gas Lift Certification: Must pass 5GS safety certification to avoid explosion risks.
• Material Selection: Breathable mesh fabric is recommended to reduce summer heat buildup; individuals with a heavier build (e.g., over 90 kilograms) should choose thickened mesh or leather seat surfaces to enhance load-bearing capacity.

6. Pairing Recommendations

• Desk-Chair Height Difference: Maintain a 25 to 30-centimeter height difference between the chair and the desktop. For example, a standard 78-centimeter-high desk is recommended to be paired with a 48-centimeter-high chair.
• Special Scenario Adaptation: Executive chairs can reach a height of 75 centimeters and require a wide seat surface (width ≥ 55 centimeters); during design, ensure that the seat surface and backrest conform to the natural curve of the spine to prevent lumbar suspension.