Choosing the right chair size isn’t just about comfort—it directly impacts your posture, spinal alignment, and long-term health. A wrong size can lead to poor ergonomics, even if the chair itself is premium.
The good news? Secretlab simplifies this with three well-engineered sizes: Small (S), Regular (R), and XL—each designed using ergonomic data to fit different body types.
Let’s break it down step-by-step so you can pick the perfect fit.
📏 Secretlab Size Chart (S vs R vs XL)
Here’s the most important part—your height and weight.
| Size | Recommended Height | Recommended Weight |
|---|---|---|
| Small (S) | ≤ 169 cm (5’6″) | < 90 kg |
| Regular (R) | 170 – 189 cm (5’7″ – 6’2″) | < 100 kg |
| XL | 181 – 205 cm (5’11” – 6’9″) | 80 – 180 kg |
📌 These ranges are based on ergonomic testing and design optimization.
👉 Important: If you fall between sizes, your body proportions and preferences matter more than just numbers.
🪑 Visual Difference Between Sizes
Each size isn’t just scaled—it’s individually engineered:
- – Larger sizes have wider seats and taller backrests
- – Smaller sizes are optimized for leg reach and lumbar alignment
- – Seat depth increases as you move from S → XL
🔍 Step-by-Step Guide to Choose the Right Size
1. Start with Your Height (Primary Factor)
Height determines:
- – Backrest alignment
- – Head pillow positioning
- – Lumbar support placement
👉 Example:
- – If you’re 5’5″ (165 cm) → Small is ideal
- – If you’re 5’10” (178 cm) → Regular fits best
- – If you’re 6’3″ (190 cm) → XL is recommended
📌 Taller users need higher backrests to properly support the spine.
2. Check Your Weight (Secondary Factor)
Weight affects:
- – Seat durability
- – Cushion compression
- – Long-term comfort
👉 Example:
- – If you’re heavy but not tall, XL may still be better due to stronger hydraulics and wider base.
3. Consider Seat Depth (MOST OVERLOOKED)
Seat depth = distance from backrest to seat edge.
- – Too deep → cuts circulation behind knees
- – Too short → lacks thigh support
📌 Ideal fit:
👉 Leave 2–4 fingers gap between seat edge and your knees
Seat depth increases from:
- – S → ~18.9 inches
- – R → ~19.3 inches
- – XL → ~19.7 inches
4. Think About Your Sitting Style
Your habits matter more than you think:
- – Upright worker → Regular (balanced ergonomics)
- – Relaxed gamer / recliner → XL (more space)
- – Compact posture / shorter legs → Small
5. Snug Fit vs Spacious Feel
This is where most people get confused.
- – Choose Small/Regular if you want:
- – Tighter, ergonomic “hug”
- – Better posture enforcement
- – Choose Regular/XL if you want:
- – More room to move
- – Relaxed sitting posture
📌 Secretlab itself recommends:
- – Size up → more space
- – Size down → snug fit
⚖️ What If You’re Between Two Sizes?
This is very common. Here’s what to do:
Case 1: Between S and R
- – Short legs → go Small
- – Want more space → go Regular
Case 2: Between R and XL
- – Taller torso → go XL
- – Average build → stick with Regular
Case 3: Heavy but Not Tall
- – Choose XL for durability and comfort
🧠 Pro Tips (Most People Ignore These)
✔ Measure Your Current Chair
Compare:
- – Seat width
- – Seat depth
- – Backrest height
This gives a real-world reference.
✔ Check Foot Position
Your feet should:
- – Rest flat on the floor
- – Knees at ~90° angle
If not → wrong size.
✔ Consider a Footrest (If Needed)
If you’re slightly short for a chair:
- – A footrest can fix posture issues
❌ Common Mistakes to Avoid
- – Choosing based on looks only
- – Ignoring seat depth
- – Assuming “bigger is always better”
- – Not considering posture habits
👉 The wrong size cancels out ergonomic benefits.
🏆 Final Verdict
Choosing the perfect Secretlab chair size is actually simple if you follow this rule:
👉 Height → Weight → Seat Depth → Preference
Quick Summary:
- – Small (S) → Best for shorter users (≤5’6″)
- – Regular (R) → Best for most people (5’7″–6’2″)
- – XL → Best for tall or heavier users
🔚 Bottom Line
A Secretlab chair is only as good as its fit.
Pick the right size, and you get:
- – Perfect spinal alignment
- – Better comfort for long hours
- – Reduced fatigue and pain
Pick the wrong one, and even a premium chair won’t feel right.