Custom Size for Office Chairs

The custom size of office chairs should be determined comprehensively based on ergonomic standards and individual needs. The core parameters and adjustment ranges are as follows:

1. Seat Height

• Standard Range: 40-55 cm, suitable for individuals with heights ranging from 1.6 meters to 1.9 meters.
• Adjustment Recommendations:
  • For a standard seat height compatible with a regular computer desk of 72 cm in height, it is recommended to choose a model with an 8-12 cm height adjustment feature. For example, an individual who is 170 cm tall should adjust the seat to approximately 43 cm, allowing the thighs and lower legs to hang naturally at a 95° angle.
  • Fixed seat heights typically range from 40-45 cm, but it is advisable to extend the adjustable range to 38-48 cm to accommodate a wider range of heights.
  • Maintain a 25-30 cm drop between the seat height and the desktop to prevent arm suspension or excessive shoulder strain.

2. Seat Width

• Standard Range: 45-55 cm, ensuring that the buttocks are fully supported by the seat surface, avoiding压迫 from a seat that is too narrow or instability from one that is too wide.
• Suitable Scenarios: Users with a regular build can opt for a seat width of 45-50 cm; those with a wider build or requiring additional space for movement can consider widening it to 50-55 cm.

3. Seat Depth

• Standard Range: 35-45 cm, with 40-45 cm covering the needs of 95% of adults.
• Adjustment Key Points:
  • After sitting fully on the buttocks, maintain a 2-3 finger gap between the back of the knees and the seat surface to avoid compressing blood vessels and nerves.
  • Individuals over 185 cm tall should choose an extended seat depth of up to 50 cm to prevent thigh suspension and ensure proper blood circulation.

4. Backrest Height

• Medium Backrest: Typically does not exceed the waist position (approximately between the waist and shoulders), suitable for daily office scenarios.
• High-End Backrest: Features a 50-60 cm curved design, covering the 4th to 6th lumbar vertebrae, providing precise support; if equipped with an independent lumbar support, its width is recommended to be 25-30 cm to fit the lumbar curve.

5. Armrest Height

• Adjustment Range: 20-30 cm, maintaining a 5 cm gap with the underside of the office desk to ensure that the arms hang naturally with the elbows bent at 90°-100°, reducing shoulder and neck strain.

6. Other Adjustment Features

• Seat Tilt: Supports a 5° forward tilt (suitable for desk work) and a 15° backward tilt (suitable for resting), dispersing body pressure through dynamic adjustment.
• Headrest Adjustment: With an up-and-down travel of approximately 15 cm, some high-end models (such as HermanMiller) feature a dual-segment headrest that can precisely match the cervical curve, relieving neck fatigue.

Customization Recommendations: The actual size should be determined by considering the user's build, usage scenario (such as prolonged sitting or frequent movement), and adjustment feature requirements. Prioritize models with a wider adjustable range to adapt to different scenarios.