Quick answer: To take your own suit measurements at home, you need a soft cloth tape measure, a fitted shirt, and ideally a helper. Measure your neck, chest, shoulders, sleeve, waist, jacket length, hips, and inseam keeping the tape level and snug (never tight). Record each number in inches and compare it to a suit measurement chart to find your size.
A great suit lives or dies by its measurements. Even the finest fabric looks cheap when the shoulders pull or the trousers pool at the ankle. The good news: you don’t need a tailoring degree to get accurate numbers. With a $3 tape measure and ten minutes, you can capture every measurement needed for a shirt, jacket, or full custom suit and this guide includes a printable chart to keep your numbers organized.
Contents On this Page
What You’ll Need Before You Start
Accurate measurements start with the right setup. Gather these first:
- A soft cloth or fabric tape measure — never a metal builder’s tape, which won’t wrap around your body.
- A close-fitting shirt — measure over a thin dress shirt, not a bulky sweater or a bare torso.
- A mirror and a helper — self-measuring works, but a second person dramatically improves accuracy on the shoulders, sleeve, and back.
- A pen and the chart below — write numbers down immediately so you don’t misremember.
- Roughly 10 minutes in a well-lit room where you can stand naturally.
Pro tip: Stand relaxed, feet shoulder-width apart, and breathe normally. Don’t puff out your chest or suck in your stomach you want the suit to fit the real you.
The 3 Golden Rules of Measuring Yourself
Before the step-by-step, internalize these rules. They prevent 90% of common measuring mistakes:
- Keep the tape level. For any measurement that wraps around your body, the tape should be parallel to the floor the whole way around.
- Snug, not tight. The tape should sit flat against your body without digging in. You should be able to slip one finger underneath.
- Measure twice. Take each measurement two or three times and use the number that repeats. If two readings disagree, re-check your tape placement.
How to Take Your Suit Jacket Measurements
These seven measurements cover the jacket, waistcoat, and dress shirt.
1. Neck
Wrap the tape around the base of your neck, just below the Adam’s apple, where a shirt collar sits. Keep it snug but comfortable — slide one finger under the tape. This gives you your collar size.
2. Chest
Wrap the tape around the fullest part of your chest, high under the armpits and across the shoulder blades. Keep it level all the way around and breathe normally. Your chest measurement is the single most important number — it determines your base jacket size.
3. Shoulder Width
This one needs a helper. Standing straight, have them measure across your upper back from the tip of one shoulder (where the seam of a well-fitting jacket would sit) to the tip of the other. The tape should follow the natural curve of your back, not pull straight across.
4. Sleeve Length
With your arm relaxed and slightly bent, measure from the top of your shoulder (the shoulder-seam point) down the outside of your arm to your wrist bone. For a more precise reading, measure from the center back of your neck, across the shoulder, and down to the wrist.
5. Jacket Waist
Measure around your natural waistline the narrowest part of your torso, roughly at the belly button. Keep the tape level and don’t tense your stomach. This shapes how the jacket tapers.
6. Jacket Length
Have a helper measure from the base of your collar (the bony bump at the back of your neck) straight down your spine to where you want the jacket to end. As a rule of thumb, a suit jacket should end around the middle of your hand when your arms hang naturally.
7. Bicep
Wrap the tape around the fullest part of your upper arm, keeping the arm relaxed at your side. This ensures the sleeve isn’t too tight through the arm — a common problem in off-the-rack suits.
How to Take Your Trouser Measurements
These five measurements cover the suit trousers.
8. Trouser Waist
Measure around your waist where you actually wear your trousers for most men this is slightly below the natural waistline, at the top of the hip bones. Don’t measure over a belt.
9. Hips (Seat)
Standing with feet together, measure around the fullest part of your seat and hips. Keep the tape level. This prevents pulling across the seat when you sit.
10. Inseam (Inside Leg)
Measure from the top of your inner thigh (the crotch seam) straight down the inside of your leg to just above the floor, or to where you want the trouser to break. Measuring an existing pair of trousers that fits well is often the easiest method here.
11. Outseam (Outside Leg)
Measure from the top of your waistband down the outside of your leg to your desired hem. This gives your tailor a second reference point for length.
12. Thigh
Wrap the tape around the fullest part of your upper thigh. This is essential for a comfortable, modern trouser fit.
Free Suit Measurement Chart
Use this chart to record your numbers. Print it or copy it into your notes most tailors, including us, will ask for exactly these figures.
| Measurement | How to Take It |
|---|---|
| Neck | Around base of neck, below Adam’s apple |
| Chest | Around fullest part, under armpits |
| Shoulder width | Tip to tip across upper back |
| Sleeve length | Shoulder seam to wrist bone, arm bent |
| Jacket waist | Around natural waistline |
| Jacket length | Collar base down spine to hem |
| Bicep | Around fullest part of upper arm |
| Trouser waist | Where you wear your trousers |
| Hips / seat | Around fullest part of seat |
| Inseam | Inner thigh to hem |
| Outseam | Waistband to hem, outside leg |
| Thigh | Around fullest part of thigh |
Suit Size Chart: Convert Your Chest to a Jacket Size
Your chest measurement in inches usually matches your jacket size directly. The letter after the number indicates length, based on your height.
| Chest (inches) | US Jacket Size | EU Size | Length by Height |
|---|---|---|---|
| 34–35″ | 34 | 44 | S (Short): under 5’8″ |
| 36–37″ | 36 | 46 | S (Short): under 5’8″ |
| 38–39″ | 38 | 48 | R (Regular): 5’8″–6’1″ |
| 40–41″ | 40 | 50 | R (Regular): 5’8″–6’1″ |
| 42–43″ | 42 | 52 | R (Regular): 5’8″–6’1″ |
| 44–45″ | 44 | 54 | L (Long): 6’2″ and above |
| 46–47″ | 46 | 56 | L (Long): 6’2″ and above |
| 48–49″ | 48 | 58 | L (Long): 6’2″ and above |
Note: Ready-made sizing is only a starting point. A true custom suit is built from your full set of measurements, not a single size label which is why it fits in ways an off-the-rack “40R” never can.
5 Common Suit Measuring Mistakes to Avoid
Even careful people slip up. Watch for these:
- Measuring over thick clothing — always measure over a thin, fitted shirt for repeatable numbers.
- Pulling the tape too tight — this creates a suit that’s uncomfortable and looks strained.
- Letting the tape tilt — a chest or waist tape that rides up in the back adds inches and ruins the fit.
- Guessing the sleeve or jacket length — these are the hardest to self-measure; always use a helper.
- Not measuring an existing garment — a suit that already fits you well is one of the best reference tools you have.
When Should You Get Professionally Measured?
Self-measuring is perfect for online orders, quick reference, and understanding your body. But for a garment you’ll wear to weddings, interviews, and milestone moments, a professional fitting is worth it. A trained fitter accounts for posture, shoulder slope, and body asymmetry that a tape measure alone can’t capture.
At Maximus Custom Clothing, our expert tailors take precise measurements in person and translate them into a suit cut from a unique pattern made only for you. If you’re in the New York area, book a fitting appointment or explore our tailoring and alterations services if you already own a suit that needs perfecting.
Frequently Asked Questions
Can I measure myself for a suit without help?
Yes, you can take most suit measurements alone using a mirror — including neck, chest, waist, hips, and inseam. However, shoulder width, sleeve length, and jacket length are far more accurate with a helper, so ask a friend for those three if possible.
What measurements do I need for a custom suit?
For a full custom suit you need 12 core measurements: neck, chest, shoulder width, sleeve length, jacket waist, jacket length, and bicep for the jacket; plus trouser waist, hips, inseam, outseam, and thigh for the trousers. A tailor may take additional posture-based measurements in person.
Should suit measurements be taken in inches or centimeters?
Either works, as long as you stay consistent and tell your tailor which unit you used. In the United States, jacket sizes are typically listed in inches, while European sizing uses centimeters.
How do I convert my chest measurement to a suit size?
Your chest measurement in inches usually equals your jacket size. For example, a 40-inch chest is roughly a size 40. Add a length letter based on height: Short (under 5’8″), Regular (5’8″–6’1″), or Long (6’2″ and above).
How tight should the tape measure be when measuring for a suit?
The tape should be snug but not tight — flat against your body with enough room to slip one finger underneath. Pulling too tight produces measurements that lead to an uncomfortably restrictive suit.
How often should I re-measure myself for a suit?
Re-measure any time your weight changes noticeably, and at minimum once a year. Even small changes in chest or waist size can affect how a fitted suit sits.
Final Thoughts
Taking your own suit measurements at home is simple once you know where the tape goes and how it should sit: level, snug, and measured twice. Keep your completed chart somewhere safe it’s the foundation of every well-fitting garment you’ll buy from here on. And when you’re ready for a suit that fits like it was made for you (because it was), the team at Maximus Custom Clothing is ready to help.
