1. Seat Depth: The Key to Thigh Support
Standard Recommendations: The ideal seat depth is 38-45 cm, covering about 3/4 of the thigh length. When seated, there should be 2-3 fingers’ width of space between the back of the knees and the seat edge to avoid blood vessel compression.
Purchasing Tips: Choose a shallower depth (38-40 cm) if shorter; opt for 42 cm or more if taller. After sitting fully back, try placing a fist between the knee and seat edge—if it doesn’t fit, the depth is excessive.
2. Backrest: Lumbar Support Angle Determines Comfort
Scientific Design: Optimal Tilt Angle: The backrest should form a 95-105 degree angle with the seat, slightly reclined to reduce lumbar pressure. Lumbar Support Height: Should support the third and fourth lumbar vertebrae (typically 18-25 cm above the seat).
Common Mistakes: Overly vertical backrests (90 degrees) force the spine into a rigid position, causing muscle fatigue. Ornamental hollowed backrests lack practical support and are unsuitable for prolonged use.
3. Cushion Material: The Art of Balancing Softness and Firmness
Expert Advice: The cushion should not sink more than 3 cm; excessive softness accelerates fatigue. The front edge should be waterfall-curved to avoid pressure on thigh muscles.
4. Auxiliary Designs: Details That Enhance Experience
Humanized Details: Armrest Height: 20-23 cm above the seat, must align with the table underside for easy storage.
Leg Design: Legs splayed at 15 degrees offer 30% more stability than vertical legs.
Surface Treatment: Solid wood chairs should have rounded edges to prevent bumps.
5. Scenario-Based Purchasing Guide
Frequent Remote Workers: Opt for chairs with lumbar support and breathable mesh to avoid heat buildup.
Families with Elders: Seat height should be slightly above the knees (45-48 cm) for easy standing.
Small Spaces: Prioritize armless designs to save space and simplify storage.
Comfort is not subjective but a quantifiable scientific metric. From seat depth to backrest angle, material to detailed design, every parameter impacts the experience. Save this guide, and you’ll become the “ergonomic expert” in your family’s eyes when choosing dining chairs.
Post time: Sep-17-2025