How to Measure for a Suit: A Complete Step-by-Step Guide
Last modified: Brad WintersA suit can only look as good as the way it fits. Whether you are ordering a custom suit remotely, checking your measurements before shopping, or simply trying to understand what a tailor measures, knowing how to measure for a suit gives you a much better starting point.
Quick answer: To measure for a suit, take your chest, shoulders, sleeve length, jacket length, natural waist, trouser waist, seat or hips, thigh, inseam and outseam measurements while standing naturally. Use a flexible tailor's tape, keep it level, and record your actual body measurements without adding or subtracting extra room.
Suit Measurements at a Glance
A complete suit fitting normally requires measurements for both the jacket and trousers. The exact method can vary slightly between tailors, so always follow the instructions provided by the company making your garment.
| Measurement | Where to Measure | Important Check |
|---|---|---|
| Chest | Around the fullest part of the chest and shoulder blades | Keep the tape level without pulling it tight |
| Shoulders | Across the upper back from shoulder point to shoulder point | Follow the body's natural curve |
| Sleeve | From the shoulder point to the wrist | Keep the arm relaxed with a slight bend |
| Jacket Length | From the tailor's specified shoulder or collar reference point to the jacket hem | Follow the measurement method requested by your tailor |
| Natural Waist | Around the natural waist | Stand naturally and do not suck in your stomach |
| Trouser Waist | Around the position where your suit trousers will sit | Do not rely on your jeans size |
| Seat or Hips | Around the fullest part of the seat and hips | Keep the tape horizontal |
| Thigh | Around the fullest part of the upper thigh | Do not compress the leg |
| Inseam | From the crotch down the inside of the leg | Confirm whether your tailor wants a body or garment measurement |
| Outseam | From the trouser waist position down the outside of the leg | Stand naturally with your weight evenly balanced |
What You Need Before Measuring for a Suit
Wear a thin shirt and lightweight trousers, empty your pockets and stand in a natural, relaxed position. Use a flexible tailor's measuring tape rather than a rigid ruler or construction tape.
If possible, ask another person to take your measurements. Measuring yourself can work for some areas, but reaching, turning or looking down can change your posture and affect the numbers, especially when measuring the shoulders, back or sleeve length.
Most importantly, record your actual measurements. Do not add inches because you want a relaxed fit or subtract them because you prefer a slimmer silhouette. Fit preference and wearing ease should be handled during the tailoring process, not by changing the measurements yourself.
Body Measurements vs. Garment Measurements
Before you start, confirm whether your tailor wants body measurements or finished-garment measurements. They are not the same and should not be used interchangeably.
Body measurements are taken directly around or along your body. Garment measurements are taken from an existing jacket or pair of trousers, often while the garment is laid flat. A suit that already fits you well can be a useful reference, but only use those measurements if the tailor specifically requests garment measurements.
When in doubt, follow the measurement method supplied by your tailor rather than trying to convert one type of measurement into another.
How to Measure for a Suit Jacket
A suit jacket depends on several measurements working together. Chest, shoulders, sleeves, jacket length and waist all influence how the jacket sits on the body, so take each measurement while maintaining the same natural posture.
1. How to Measure Your Chest for a Suit
Wrap the measuring tape around the fullest part of your chest, usually beneath the armpits and across the shoulder blades. Keep the tape parallel to the floor all the way around your body.
Stand normally and breathe naturally. The tape should make contact with the body without squeezing or compressing your chest. Avoid expanding your chest or holding your breath while the measurement is being taken.
2. How to Measure Shoulders for a Suit
To measure your shoulders for a suit, ask another person to place the end of the tape at the shoulder point where a jacket sleeve seam would naturally sit. Run the tape across the upper back to the corresponding point on the opposite shoulder.
Follow the natural curve of the upper back rather than pulling the tape into an artificially straight line. Keep your arms relaxed at your sides and maintain your normal posture. Do not pull your shoulders backward or round them forward while being measured.
Accurate shoulder measurements are particularly important because jacket shoulders establish much of the garment's overall structure. Shoulder changes can also be more complicated than simpler adjustments such as sleeve length or waist suppression.
Your natural build can influence how a jacket sits even when two people share similar measurements. Our guide to male body types explains how differences in proportion can affect clothing fit and appearance.
3. How to Measure Sleeve Length for a Suit
Identify the shoulder point and measure down the outside of the arm toward the wrist. Keep your arm relaxed with a slight natural bend rather than holding it completely rigid.
The exact starting and finishing points can vary between tailors, so follow the instructions provided by the company making your suit.
Dress shirt sleeve measurements may use a different method, sometimes beginning at the center back of the neck and continuing across the shoulder and down the arm. If you are also ordering a shirt, see our custom dress shirt guide.
4. How to Measure Suit Jacket Length
Jacket length is influenced by your height, torso length, body proportions and the intended style of the suit. A traditional suit jacket generally covers most or all of the seat while creating a visually balanced relationship between the upper and lower body.
Measure from the shoulder or collar reference point specified by your tailor down to the intended jacket hem. Because different tailoring systems may use different starting points, consistency with your tailor's instructions is more important than using a measurement method from another brand.
If you are comparing silhouettes, our guide to different suit cuts provides additional context on how proportion and cut influence the finished look.
5. Measure the Natural Waist and Stomach
For tailoring, the word "waist" does not always refer to the waistband position of your jeans. Your tailor may request the natural waist, the stomach measurement, or both.
Wrap the tape around the requested area while standing normally. Keep it level and close to the body without pulling it tight. Do not suck in your stomach or push it outward.
Record the actual measurement and allow the tailor to determine the appropriate shaping and ease for the jacket.
How to Measure Suit Trousers
Suit trousers often sit differently from casual jeans, so first establish where you intend the trouser waistband to sit. Once that position is clear, measure the waist, seat or hips, thigh, inseam and outseam while maintaining the same natural stance.
If you are considering trousers made specifically for your measurements and preferred styling, you can also view our custom tailored trousers.
6. How to Measure the Trouser Waist
Wrap the tape around the point where you intend your suit trousers to sit. Keep the tape level and comfortably against the body.
Do not simply use the waist size printed inside another pair of trousers. Clothing sizes vary, and the waistband of casual jeans may sit in a different position from tailored trousers.
7. How to Measure the Seat or Hips
Wrap the measuring tape around the fullest part of your seat and hips. Keep your feet in a natural position and make sure the tape remains horizontal around the body.
This measurement helps determine how the trousers fit and drape through the seat. A measurement that is too tight or incorrectly positioned can affect comfort as well as the way the pockets and upper trouser area sit.
8. How to Measure the Thigh
Measure around the fullest part of the upper thigh. Keep the tape close to the body without pulling it tightly into the leg.
The thigh measurement helps establish how much room the trousers need through the upper leg and can influence both comfort and the overall trouser silhouette.
9. How to Measure the Inseam
The inseam runs from the crotch down the inside of the leg to the intended trouser length. Stand upright while the measurement is taken and avoid bending your knee or shifting your weight.
A pair of well-fitting trousers can also provide a useful reference, but confirm whether your tailor wants a body measurement or a finished-garment measurement before submitting the number.
10. How to Measure the Outseam
The outseam runs from the intended trouser waist position down the outside of the leg to the desired hem. Unlike the inseam, the measurement begins at the waistband rather than at the crotch.
Stand naturally with your legs straight and your weight evenly balanced while the measurement is taken.
Can You Measure Yourself for a Suit?
You can take some suit measurements yourself, but having another person help generally makes the process easier and reduces the chance of changing your posture while reaching for the tape.
Chest and waist measurements are relatively straightforward to check yourself. Shoulder width, sleeve length and some trouser measurements are more difficult because turning, bending or looking down can alter the result.
If you do measure yourself, take each measurement at least twice. If the numbers differ, reset your posture and measure again rather than averaging measurements taken from different positions.
Common Suit Measuring Mistakes
- Pulling the measuring tape too tightly.
- Adding extra room to your body measurements.
- Subtracting inches to create a slimmer fit.
- Measuring over bulky clothing.
- Changing your posture while being measured.
- Assuming both shoulders or arms are perfectly symmetrical.
- Mixing body measurements with garment measurements.
- Using an old suit size as a substitute for taking current measurements.
Measurements Are Only Part of Good Suit Fit
Two people can have similar chest and waist measurements but carry those measurements very differently. Shoulder slope, posture, torso length, body shape and preferred silhouette can all affect how a jacket and trousers should be cut.
Measurements therefore provide the foundation of the fit rather than the complete picture. Understanding whether you prefer a closer or more relaxed silhouette is also important. Our guide to tailored fit vs. slim fit explains some of those differences in more detail.
The same principle applies to bespoke tailoring. If you want to understand how individual measurements, garment construction and customization work together, read our guide to understanding bespoke suits.
How to Use Your Measurements When Ordering a Suit
Once you have recorded your measurements, submit them exactly as requested rather than trying to alter the numbers to create your preferred fit. Your measurements describe your body; the tailoring process determines how the garment should fit around it.
At BadAss Bespokery, our bespoke suit process combines individual measurements with choices around fabric, construction, design and fit. You can also create a custom 2-piece suit or custom 3-piece suit based on your occasion and preferred style.
Frequently Asked Questions About Suit Measurements
What measurements do I need for a suit?
The main measurements generally include chest, shoulders, sleeve length, jacket length, natural waist or stomach, trouser waist, seat or hips, thigh, inseam and outseam. Your tailor may request additional measurements depending on the garment and measurement system being used.
How do I measure my shoulders for a suit?
Measure across the upper back from one shoulder point to the other while keeping your arms relaxed. Follow the natural curve of the back instead of stretching the tape in a perfectly straight line. It is usually easier and more accurate to have another person take this measurement.
How do I measure suit trousers?
Begin by identifying where you intend the suit trousers to sit. Then measure the trouser waist, fullest part of the seat or hips, upper thigh, inseam and outseam while standing naturally. Do not rely on the size label from jeans or another pair of trousers.
Can I measure myself for a suit at home?
Yes, several measurements can be taken at home, although having someone assist you is preferable for shoulders, sleeves and other areas that are difficult to reach without changing your posture. Use a flexible measuring tape and repeat measurements if you are unsure of the result.
How tight should the measuring tape be?
The measuring tape should sit against the body without squeezing it. It should not hang loosely, but it should also not compress the chest, waist, hips or legs. The goal is to record your actual body measurement rather than create the desired garment fit with the tape.
Should I measure my body or a suit that already fits?
That depends on what your tailor requests. Body measurements are taken directly from your body, while garment measurements come from an existing jacket or pair of trousers. Do not substitute one for the other unless the tailor specifically instructs you to do so.
What is the difference between inseam and outseam?
The inseam measures the inside of the leg from the crotch toward the trouser hem. The outseam measures down the outside of the leg from the trouser waistband to the hem. Both can help establish trouser length and proportion.
Measure Carefully, Then Let the Tailoring Handle the Fit
The best approach is simple: stand naturally, use a consistent measurement method and record the numbers honestly. Do not try to create a slim, classic or relaxed fit by changing your measurements yourself.
Accurate measurements give the tailoring process a better foundation for creating balanced proportions, comfortable movement and a suit that is shaped around your body rather than a generic size label.
