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Low Back Ergonomic Task Chair for Small to Medium Users (5'4"–5'8")

The Office Master PT74 Paramount Value Series is a low-back ergonomic task chair designed specifically for users 5'4"–5'8" who need adjustable lumbar support, seat depth customization, and multi-tilt functionality without the bulk of oversized chairs. With professional-grade adjustability and durable construction supporting up to 300 lbs, the PT74 delivers ergonomic comfort for all-day productivity in home offices, corporate workspaces, and shared seating environments.

⚠️ Custom Order Notice: Each chair is custom-built to your specifications to ensure optimal ergonomic fit. Because this item is made to order, it is non-returnable and non-refundable. Please review your configuration carefully before ordering.

Why PT74 for Small to Medium Users

• Sized for 5'4"–5'8" Users: Low-back design prevents the poor fit and lack of support that occurs when smaller users sit in oversized chairs
• Adjustable Lumbar Support: Customizable lower back support reduces fatigue and prevents slouching during extended sitting
• Seat Depth Adjustment (Slider): 3" seat slider (17"–20.1" depth) ensures proper thigh support without pressure behind knees
• Multi-Tilt Functionality: Independent seat tilt, back tilt, and forward tilt provide dynamic sitting options and posture changes
• Easy Back Height Adjustment: Raise or lower backrest to align lumbar support with your lower back curve
• Pneumatic Height Adjustment: Smooth seat height range 17"–22" accommodates various desk heights and user preferences
• Rocking & Forward Tilt: Tension-adjustable tilting encourages active sitting and reduces static loading
• 300 lb Weight Capacity: Durable construction with 12-year limited warranty

Clinical Benefits for Ergonomic Seating

Standard office chairs are designed for average-height users (5'8"–5'10"), leaving smaller users with poor ergonomic fit—feet dangling, lumbar support positioned too high, seat depth too long causing pressure behind knees. The PT74's low-back design and extensive adjustability solve these problems by providing proper support scaled to smaller body dimensions. Adjustable lumbar support maintains natural spinal curvature, seat depth adjustment prevents circulation restriction, and multi-tilt functionality allows posture changes that reduce static muscle fatigue.

Who It's Built For

Essential for users 5'4"–5'8" experiencing poor fit in standard chairs, office professionals needing all-day ergonomic support, home office workers seeking professional-grade seating, corporate environments standardizing ergonomic task chairs, shared workspaces requiring adjustable seating for multiple users, and anyone experiencing back pain from chairs that don't fit their body dimensions. Perfect for users who found larger chairs uncomfortable or who need customizable support without premium executive chair pricing.

Technical Specifications

• Seat Height Range: 17"–22" (pneumatic adjustment)
• Seat Dimensions: 20" W × 17"–20.1" D (3" slider adjustment)
• Back Dimensions: 17" W × 18" H (low-back design)
• Overall Width: 27"
• Overall Height: 35"–44" (adjustable)
• Weight Capacity: 300 lbs
• Lumbar Support: Adjustable height and depth
• Tilt Mechanism: Multi-tilt (independent seat/back tilt, forward tilt, tension adjustment)
• Armrest Options: No arms or KR-200 height-adjustable arms
• Upholstery: Grade 1 Black fabric (call for additional fabric options)
• Base: 5-star nylon base with dual-wheel casters
• Warranty: 12-year limited warranty
• Manufacturer: Office Master (Made in USA)
• User Height Range: Optimized for 5'4"–5'8"

Armrest Options

No Armrests: Clean, open design allows freedom of movement and fits under lower desks. Ideal for users who prefer armrest-free seating or have limited desk clearance.

KR-200 Height-Adjustable Armrests: Adjustable-height arms provide forearm support to reduce shoulder elevation and neck tension. Recommended for users who rest forearms while typing or using a mouse.

Multi-Tilt Mechanism Explained

The professional-grade multi-tilt mechanism provides dynamic seating that supports natural movement:

• Independent Back Tilt: Recline backrest independently from seat for lumbar support while maintaining seat position
• Seat Tilt: Tilt entire seat forward or back to adjust hip angle and reduce lower back pressure
• Forward Tilt: Tilt seat forward for task-focused work—opens hip angle and reduces lumbar disc pressure
• Tension Adjustment: Customize tilt resistance to match your body weight and preference
• Tilt Lock: Lock chair in upright position or allow free rocking motion

Seat Depth Adjustment Guide

Proper seat depth ensures thigh support without pressure behind knees. Sit fully back in chair—there should be 2–3 fingers width between seat edge and back of knees. If seat presses into knees, slide seat forward. If gap is too large, slide seat back. The 3" adjustment range (17"–20.1") accommodates varying leg lengths within the 5'4"–5'8" user range.

Lumbar Support Adjustment

Adjust lumbar support height so it aligns with the natural inward curve of your lower back (approximately belt line height). Adjust depth (in/out) to provide gentle, even pressure supporting your lumbar curve without pushing you forward from the backrest. Proper lumbar support prevents slouching and maintains healthy spinal alignment during extended sitting.

Custom Order Process

⚠️ Important: Each PT74 chair is custom-built to your specifications. Review your configuration carefully:

1. Select armrest option (no arms or KR-200 adjustable arms)
2. Confirm fabric selection (Grade 1 Black standard; call for other options)
3. Verify specifications match your needs
4. Place order—chair will be built to your configuration
5. Non-returnable and non-refundable due to custom manufacturing

Why Low-Back Design for Smaller Users

Standard mid-back and high-back chairs are scaled for average-height users, leaving smaller users with lumbar support positioned too high (supporting mid-back instead of lower back), excessive back height that doesn't provide proper support, and overall proportions that don't match smaller body dimensions. The PT74's low-back design scales all dimensions appropriately for 5'4"–5'8" users, ensuring lumbar support aligns correctly and overall chair proportions match body size.

Office Master Quality & Warranty

Manufactured by Office Master in the USA with commercial-grade components designed for daily office use. The 12-year limited warranty reflects Office Master's confidence in long-term durability and performance. Office Master has been a trusted name in ergonomic seating for decades, providing chairs to corporate offices, government facilities, and professional workspaces nationwide.

Frequently Asked Questions

What height range is this chair designed for?

The PT74 is optimized for users 5'4"–5'8". The low-back design, seat dimensions, and adjustment ranges are scaled for smaller body dimensions to ensure proper ergonomic fit.

Can I return this chair if it doesn't fit?

No. Because each chair is custom-built to your specifications, the PT74 is non-returnable and non-refundable. Please review dimensions and specifications carefully before ordering. Our ergonomic specialists can help confirm this chair is right for your needs before you order.

Should I choose the version with or without armrests?

Choose armrests (KR-200) if you rest your forearms while typing or using a mouse—they reduce shoulder and neck tension. Choose no armrests if you prefer freedom of movement, have limited desk clearance, or don't use armrests while working.

How do I adjust the seat depth?

The seat slider mechanism (typically located under the front of the seat) allows you to slide the seat forward or back within the 3" range. Adjust so there's 2–3 fingers width between the seat edge and the back of your knees when sitting fully back.

What's the difference between this and a mid-back or high-back chair?

The PT74's low-back design (18" back height) is scaled for users 5'4"–5'8". Mid-back and high-back chairs are designed for taller users and often provide poor ergonomic fit for smaller users—lumbar support positioned too high, excessive back height, and proportions that don't match smaller body dimensions.

Can I get this in a different fabric or color?

Yes! The standard configuration is Grade 1 Black fabric. Call us for additional fabric options, colors, and custom configurations. Volume pricing is also available for multiple chair orders.

How long does it take to receive a custom-built chair?

Because each chair is custom-manufactured, lead times vary. Contact us for current production and shipping timelines based on your configuration.

Will this chair work with a standing desk?

The 17"–22" seat height range works with standard desk heights (28"–30"). For standing desks, ensure the desk lowers to a height that allows your feet to rest flat on the floor when seated with thighs parallel to the ground.

What's the weight capacity?

The PT74 supports up to 300 lbs with commercial-grade construction designed for daily office use.

Is assembly required?

Minimal assembly required—typically attaching the base, casters, and armrests (if selected) to the seat/back assembly. Basic tools included. Assembly takes 10–15 minutes.

Why AskErgoWorks

As certified ergonomics specialists with over 30 years of experience, we've helped hundreds of professionals find the right ergonomic seating for their body dimensions and work requirements. The Office Master PT74 is our top recommendation for users 5'4"–5'8" who need professional-grade ergonomic adjustability without the poor fit of oversized chairs—it's the only low-back task chair that combines proper sizing for smaller users with comprehensive adjustment capabilities.

We don't just sell office chairs; we provide the expertise to ensure proper fit, configuration, and setup for maximum comfort and productivity.

Not sure if the PT74 is right for your height and needs? Our ergonomic evaluation services include personalized seating recommendations, chair sizing guidance, and configuration assistance based on your body dimensions, work tasks, and ergonomic requirements. We can help you confirm the right chair before you order this custom, non-returnable product.

Free shipping on orders over $99. 12-year warranty. Made in USA. Custom-built to order. Optimized for 5'4"–5'8" users. Call for volume pricing and fabric options.