Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and pinform backrest shape.
Sitmatic FORMA ergonomic office chair in black fabric, side view showing adjustable arms and five-star caster base.
Sitmatic FORMA ergonomic office chair in black fabric, rear angled view showing backrest contour and lumbar support mechanism.
Sitmatic FORMA ergonomic office chair features diagram labeling lumbar support, pinform backrest, seat height, and caster base.
Sitmatic FORMA ergonomic office chair fabric swatch in black Flexx textured weave, close-up of material.
Sitmatic FORMA chair dimensions diagram comparing smaller, standard, and larger seat sizes with measurements.
Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and waterfall seat edge.
    Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and pinform backrest shape.
    Sitmatic FORMA ergonomic office chair in black fabric, side view showing adjustable arms and five-star caster base.
    Sitmatic FORMA ergonomic office chair in black fabric, rear angled view showing backrest contour and lumbar support mechanism.
    Sitmatic FORMA ergonomic office chair features diagram labeling lumbar support, pinform backrest, seat height, and caster base.
    Sitmatic FORMA ergonomic office chair fabric swatch in black Flexx textured weave, close-up of material.
    Sitmatic FORMA chair dimensions diagram comparing smaller, standard, and larger seat sizes with measurements.
    Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and waterfall seat edge.
Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and pinform backrest shape.
Sitmatic FORMA ergonomic office chair in black fabric, side view showing adjustable arms and five-star caster base.
Sitmatic FORMA ergonomic office chair in black fabric, rear angled view showing backrest contour and lumbar support mechanism.
Sitmatic FORMA ergonomic office chair features diagram labeling lumbar support, pinform backrest, seat height, and caster base.
Sitmatic FORMA ergonomic office chair fabric swatch in black Flexx textured weave, close-up of material.
Sitmatic FORMA chair dimensions diagram comparing smaller, standard, and larger seat sizes with measurements.
Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and waterfall seat edge.
Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and pinform backrest shape.
Sitmatic FORMA ergonomic office chair in black fabric, side view showing adjustable arms and five-star caster base.
Sitmatic FORMA ergonomic office chair in black fabric, rear angled view showing backrest contour and lumbar support mechanism.
Sitmatic FORMA ergonomic office chair features diagram labeling lumbar support, pinform backrest, seat height, and caster base.
Sitmatic FORMA ergonomic office chair fabric swatch in black Flexx textured weave, close-up of material.
Sitmatic FORMA chair dimensions diagram comparing smaller, standard, and larger seat sizes with measurements.
Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and waterfall seat edge.
    Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and pinform backrest shape.
    Sitmatic FORMA ergonomic office chair in black fabric, side view showing adjustable arms and five-star caster base.
    Sitmatic FORMA ergonomic office chair in black fabric, rear angled view showing backrest contour and lumbar support mechanism.
    Sitmatic FORMA ergonomic office chair features diagram labeling lumbar support, pinform backrest, seat height, and caster base.
    Sitmatic FORMA ergonomic office chair fabric swatch in black Flexx textured weave, close-up of material.
    Sitmatic FORMA chair dimensions diagram comparing smaller, standard, and larger seat sizes with measurements.
    Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and waterfall seat edge.
Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and pinform backrest shape.
Sitmatic FORMA ergonomic office chair in black fabric, side view showing adjustable arms and five-star caster base.
Sitmatic FORMA ergonomic office chair in black fabric, rear angled view showing backrest contour and lumbar support mechanism.
Sitmatic FORMA ergonomic office chair features diagram labeling lumbar support, pinform backrest, seat height, and caster base.
Sitmatic FORMA ergonomic office chair fabric swatch in black Flexx textured weave, close-up of material.
Sitmatic FORMA chair dimensions diagram comparing smaller, standard, and larger seat sizes with measurements.
Sitmatic FORMA ergonomic office chair in black fabric, front view showing adjustable arms and waterfall seat edge.

About

📋 View Our Chair Fitting Form — Click Here

Professional-Grade Ergonomics | Trusted by Ergonomists for 30+ Years | Free Shipping

The Sitmatic FORMA Ergonomic Office Chair is a premium seating solution designed to deliver exceptional support, comfort, and adjustability. Recommended by Ask Ergo Works — certified ergonomic specialists with 30+ years of expertise.

📐 Not sure which size? Use our Chair Fitting Form or contact our specialists.

Key Features

  • Adjustable Lumbar Support — height and depth adjustable
  • Seat Depth Adjustment — prevents circulation cutoff behind knees
  • Multi-Position Adjustable Armrests — height and width adjustable
  • Synchro-Tilt Mechanism — adjustable tension and tilt lock
  • 3 Sizes — Petite, Standard, X-Large
  • Free Shipping on all orders

Sizing Guide

Size Seat Height Seat D×W Capacity Best For
Small 16.75–21.25" 18×19" 350 lbs Petite users
Medium 16.75–21.25" 19×21" 350 lbs Most users
Large 16.75–21.25" 22×24" 550 lbs Larger frames

Who This Is For

  • Professionals working 8+ hours daily
  • People with lower back pain, herniated disc, or sciatica
  • Post-surgical users needing precise positioning
  • Corporate, healthcare, and government ergonomic programs

⚠️ Made-to-Order: Orders are final — but we’re here to help you get it right before you order.

🏢 Corporate or healthcare program? Contact us for volume pricing →

Frequently Asked Questions

How do I choose the right size?

Small fits petite users, Medium fits most users, Large fits broader frames. Use our Chair Fitting Form or contact our specialists.

Is this chair good for lower back pain?

Yes — adjustable lumbar support reduces disc pressure and muscle strain. Seat depth adjustment ensures proper thigh support. For chronic pain, get a personalized assessment.

Is this chair good for a herniated disc?

Yes — adjustable lumbar depth positions support at the affected spinal level, reducing intradiscal pressure. Consult your PT alongside our ergonomic consulting services.

Is this chair good for sciatica?

Yes — seat depth adjustment and lumbar support address the two main sciatica triggers in office seating. For severe cases, get a personalized assessment.

Is this suitable for post-surgical recovery?

Yes — comprehensive adjustability makes it well-suited for post-surgical users. Consult your PT or OT alongside our ergonomic consulting services.

What is the warranty?

Sitmatic’s manufacturer warranty covers defects in materials and workmanship. Contact us for details.

How long does shipping take?

10–15 business days. Free shipping on all orders.

Can this be used in corporate or healthcare environments?

Yes — standard in Fortune 500 companies and healthcare facilities. Contact us for bulk orders.

Why Ask Ergo Works?

  • 30+ years of ergonomic expertise
  • Certified ergonomic specialists — Bay Area roots, nationwide reach
  • Institutional procurement support — volume pricing, net terms

Our ergonomic consulting services include personalized assessments for chair selection, lumbar positioning, and full workstation setup.

📋 View Our Chair Fitting Form — Click Here

Professional-Grade Ergonomics | Trusted by Ergonomists for 30+ Years | Free Shipping

The Sitmatic FORMA Ergonomic Office Chair is a premium seating solution designed to deliver exceptional support, comfort, and adjustability. Recommended by Ask Ergo Works — certified ergonomic specialists with 30+ years of expertise.

📐 Not sure which size? Use our Chair Fitting Form or contact our specialists.

Key Features

  • Adjustable Lumbar Support — height and depth adjustable
  • Seat Depth Adjustment — prevents circulation cutoff behind knees
  • Multi-Position Adjustable Armrests — height and width adjustable
  • Synchro-Tilt Mechanism — adjustable tension and tilt lock
  • 3 Sizes — Petite, Standard, X-Large
  • Free Shipping on all orders

Sizing Guide

Size Seat Height Seat D×W Capacity Best For
Small 16.75–21.25" 18×19" 350 lbs Petite users
Medium 16.75–21.25" 19×21" 350 lbs Most users
Large 16.75–21.25" 22×24" 550 lbs Larger frames

Who This Is For

  • Professionals working 8+ hours daily
  • People with lower back pain, herniated disc, or sciatica
  • Post-surgical users needing precise positioning
  • Corporate, healthcare, and government ergonomic programs

⚠️ Made-to-Order: Orders are final — but we’re here to help you get it right before you order.

🏢 Corporate or healthcare program? Contact us for volume pricing →

Frequently Asked Questions

How do I choose the right size?

Small fits petite users, Medium fits most users, Large fits broader frames. Use our Chair Fitting Form or contact our specialists.

Is this chair good for lower back pain?

Yes — adjustable lumbar support reduces disc pressure and muscle strain. Seat depth adjustment ensures proper thigh support. For chronic pain, get a personalized assessment.

Is this chair good for a herniated disc?

Yes — adjustable lumbar depth positions support at the affected spinal level, reducing intradiscal pressure. Consult your PT alongside our ergonomic consulting services.

Is this chair good for sciatica?

Yes — seat depth adjustment and lumbar support address the two main sciatica triggers in office seating. For severe cases, get a personalized assessment.

Is this suitable for post-surgical recovery?

Yes — comprehensive adjustability makes it well-suited for post-surgical users. Consult your PT or OT alongside our ergonomic consulting services.

What is the warranty?

Sitmatic’s manufacturer warranty covers defects in materials and workmanship. Contact us for details.

How long does shipping take?

10–15 business days. Free shipping on all orders.

Can this be used in corporate or healthcare environments?

Yes — standard in Fortune 500 companies and healthcare facilities. Contact us for bulk orders.

Why Ask Ergo Works?

  • 30+ years of ergonomic expertise
  • Certified ergonomic specialists — Bay Area roots, nationwide reach
  • Institutional procurement support — volume pricing, net terms

Our ergonomic consulting services include personalized assessments for chair selection, lumbar positioning, and full workstation setup.

Sitmatic by Sitmatic

5.0

Sitmatic FORMA Ergonomic Office Chair with Adjustable Armrests

FOR32MF 7L Cat2 Flexx Black 21201

$786.50
$786.50
Adjustable Lumbar Support — height and depth adjustable. Seat Depth Adjustment — prevents circulation cutoff behind knees. It's ...  Read more
Adjustable Lumbar Support — height and depth adjustable. Seat Depth Adjustment — prevents circulation cutoff behind knees. It's backed by the manufacturer's warranty.
Size:

Not sure this is the right fit?

Our certified specialists can evaluate your workstation and recommend the right setup for you.

Request an Ergonomic Evaluation →
Free Shipping
On orders over $99
Certified Specialists
Expert guidance on your purchase
Flexible Payments
4 interest-free installments with Shop Pay

Trusted By

DUPONT ROKU LAM RESEARCH COMERICA INTEL SURVEY MONKEY STANFORD MEDICINE BRISTOL MYERS SQUIBB

FAQs About the Sitmatic FORMA Ergonomic Office Chair

1

What does the seat depth adjustment on the Sitmatic FORMA chair do?

The Sitmatic FORMA Ergonomic Office Chair's seat depth adjustment lets you slide the seat pan forward or back to match your leg length, preventing the seat edge from pressing behind your knees. This is intended to maintain healthy circulation in the legs during long periods of sitting, independent of the chair's other lumbar and armrest adjustments.

2

How does the lumbar support adjust on the Sitmatic FORMA chair?

The Sitmatic FORMA Ergonomic Office Chair has lumbar support that adjusts in both height and depth, letting you move the support point up or down and closer or farther from your back. This dual adjustment is designed to let the lumbar support be positioned at your specific lower-back curve rather than a single fixed spot.

3

Are the armrests adjustable on the Sitmatic FORMA chair?

Yes, the Sitmatic FORMA Ergonomic Office Chair has multi-position armrests that adjust in height and width. This is intended to let you position your arms and shoulders in a more neutral posture at your specific desk height, rather than being locked into a single armrest position.

4

What does the synchro-tilt mechanism on the Sitmatic FORMA chair do?

The Sitmatic FORMA Ergonomic Office Chair uses a synchro-tilt mechanism with adjustable tension and a tilt lock, so the seat and backrest recline together at a coordinated ratio when you lean back. The adjustable tension lets you set how much resistance the recline has, and the lock lets you fix the chair in an upright position when needed.

5

What is the weight capacity of the Sitmatic FORMA chair by size?

The Sitmatic FORMA Ergonomic Office Chair is rated for 350 lbs in the Small and Medium sizes, and 550 lbs in the Large size. Choosing the size rated for your body weight, in addition to your frame size, helps ensure the chair's mechanisms perform as intended over time.

6

Can I return the Sitmatic FORMA chair if I order the wrong configuration?

No — the Sitmatic FORMA Ergonomic Office Chair is made to order based on the size and options you select, so orders are final once placed. Because of this, Ask Ergo Works recommends using the Chair Fitting Form or speaking with a specialist before ordering to confirm the right size and configuration.

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