How to Think About Custom-Fit Sizing: Getting the Right Chair for Your Body

Most chairs are sized the same way clothing used to be before tailoring became affordable: pick the closest bucket — small, medium, large — and adjust what you can with levers and knobs. For a chair you sit in for twenty minutes, that's fine. For a chair you sit in for six, eight, or twelve hours a day, "closest bucket" isn't really fit — it's a compromise you get used to. Getting sizing right starts with understanding your own body accurately, and it ends with a chair actually built around that information instead of guessed from a chart.

Why One-Size-Fits-All Sizing Falls Short

A chair sized for an "average" body is, by definition, an imperfect fit for almost everyone — because almost nobody is exactly average in every dimension that matters. Seat depth, seat height, and backrest height all need to relate to your specific leg length, torso length, and overall height for a chair to actually support you rather than just seat you. When a chair is built around one general size bucket, the parts of it that don't line up with your body are usually the parts that quietly cause discomfort over a long session — a seat pan that's slightly too deep behind the knees, or a lumbar curve that sits an inch above or below where your lower back actually is.

This matters more, not less, the longer you're in the chair. A slightly-off fit is easy to ignore for twenty minutes. Across an eight-hour session, small mismatches compound.

How to Accurately Measure Your Own Height

Getting an accurate height measurement is simpler than it sounds, but a few common mistakes throw it off:

• Measure without shoes, standing on a hard, flat floor against a wall.
• Stand with your heels, shoulder blades, and the back of your head touching the wall, looking straight ahead.
• Have someone place a flat, rigid object (a book or ruler) level on top of your head and mark the wall where it meets, rather than trying to eyeball it in a mirror.
• Measure straight down from that mark to the floor — a soft tape measure alone, without the wall mark, tends to introduce error.
• Measure in the morning if you want the most consistent reading — like most people, your spine compresses slightly over the course of a day, so height can read a bit shorter by evening.

General Seated-Posture Measurement Concepts

Beyond raw height, a few well-established ergonomic reference points are worth understanding when you're thinking about chair fit generally:

• Eye level to your screen or console: your eyes should meet the top portion of your monitor or console roughly at or slightly below eye level without tilting your neck up or down.
• Elbow angle: when your hands rest on a desk, console, or keyboard, your elbows should sit at roughly a 90-degree angle or slightly more — not sharply bent, not fully extended.
• Hip-to-knee angle: a seat that's the right height for you generally puts your knees at or slightly below hip level, with feet flat on the floor.
• Seat depth: there should be a small gap — roughly a couple of fingers' width — between the front edge of the seat and the back of your knees.

These are general concepts, not fixed rules for any one chair — but they explain why a chair's dimensions need to relate to your actual body rather than a generic size bucket.

How Stealth Solves the Fit Problem

Rather than offering a small set of fixed sizes and asking you to pick the closest one, Stealth builds every chair to the buyer's individual height and weight. That's a fundamentally different approach than sizing off a chart: instead of fitting you into the nearest available bucket, the chair is built around the measurements you actually provide. Every chair is made in Centennial, Colorado, and backed by a 5-year warranty regardless of which model or size you need.

The Bottom Line

Fit isn't a luxury detail for a chair you're in for hours at a time — it's the difference between a chair that supports you and one you just get used to. Start with an accurate measurement of your own body, understand the general posture concepts that make a chair actually work for you, and choose a chair that's built around your measurements rather than the nearest size on a chart.