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What’s This About
Measuring yourself for clothes takes a soft tape, a mirror and, for some measurements, a helper. The chest goes around the fullest part with the tape across the shoulder blades, the natural waist where your torso creases when you bend to the side, the trouser waist where the trousers will sit, the seat around the widest part of the hips and buttocks, the neck at the base with a finger under the tape, the sleeve from the centre of the back of the neck over the shoulder to the wrist bone, the inseam from the crotch seam to the top of the shoe, and, with a helper, the shoulder from point to point. The size on a label is not the same as the number on the tape. In a 2010 sample of US retailers, dress trousers labelled 36 measured between 37 and 41 inches at the waist, so check the measurement rather than the number.
This guide answers the questions men ask with a tape in one hand and a size chart on the screen, such as
• Where exactly do I measure my chest, waist, neck, sleeve and inseam?
• Is a 32 waist actually 32 inches, and why does a 34 not fit?
• What suit size am I, and what do 40R and 34×32 mean?
• What shirt size is a 16 collar, and what does a 34/35 sleeve mean?
• Should I measure my body or a shirt that already fits?
and many more!
The eight measurements are in one table with where the tape goes, and the sizes they convert to follow.
Key Points
01The eight measurements are chest, natural waist, trouser waist, seat, neck, sleeve, inseam and shoulder, taken with the tape snug and parallel to the floor. Guides differ on what to wear while you measure, from bare skin to a slim-fitting shirt; several measurements are easier with a helper, and the shoulder needs one.
02The label is not the measurement. In a 2010 sample of US retailers, a trouser waist labelled 36 measured 37 to 41 inches, so buy by the measured waist and the fit rather than by the number you think you are. How far any given brand departs today is a question for its own chart.
03Suit size is chest plus height. A 40-inch chest is a 40, with S, R or L for height. Oliver Wicks calls a six-inch drop between jacket and trousers the ready-to-wear standard, but the chart of the suit you are buying decides.
04Measure a garment that fits when you buy online. Lay a well-fitting shirt or pair of trousers flat, write the widths down as flat widths, and compare like with like against the brand’s garment chart.
The answer
The short answer
Every size chart converts body measurements into a size, so the measurements come first and the chart second.
Men’s Wearhouse’s guide asks for “a flexible measuring tape”, a helper if possible, and a tape kept “flat against your body and parallel to the floor”. For the chest, it says to “wrap the tape around the fullest part of your torso, across the shoulder blades” so it feels “snug but not tight”, and for the natural waist it puts the tape “just above your belly button”, “snug, but you should be able to comfortably slide one finger underneath”.
Sizeguide.net gives the neck and sleeve, telling you to “measure around the base of your neck, where it meets your shoulders, just below your Adam’s apple”, and “measure from middle of the back of your neck, around shoulder and elbow to wrist bone”.
The reason to measure rather than trust a label is vanity sizing. As Wikipedia’s article on it records, “In 2010, Abram Sauer of Esquire measured several pairs of dress pants with a nominal waist size of 36 in (91 cm) at different US retailers and found that actual measurements ranged from 37 to 41 in (94 to 104 cm)”, while, in the same article’s words, “the nominal inseam is fairly accurate”.
The rest of this page is the eight measurements one by one, the size conversions for suits, shirts and trousers, and the garment-measuring method for buying online.
The measurements
Where the tape goes
Scroll horizontally to see all columns →
| Measurement | Where | How | Used for |
|---|---|---|---|
| Chest | Around the fullest part of the chest, under the arms, across the shoulder blades | Arms relaxed at your sides, breathe normally, tape snug and level | Jacket and suit size, shirt fit, knitwear |
| Natural waist | Where the torso creases when you bend to the side; Men’s Wearhouse and Outdoor Equipped both place it just above the belly button | Tape snug and level, without pulling in; record the fullest part of the abdomen separately | Suit trousers, dress trousers, high-rise trousers |
| Trouser waist | Where you actually wear the waistband; for jeans and many casual trousers that is lower than the natural waist | Tape where the waistband sits, snug | Jeans, chinos, casual trousers |
| Seat (hips) | Around the widest part of the hips and buttocks | Tape level | Trouser fit, made-to-measure |
| Neck | Around the base of the neck, just below the Adam’s apple | One finger under the tape, as Outdoor Equipped and Sizeguide.net advise | Dress shirt collar size |
| Sleeve | From the centre of the back of the neck, over the shoulder, down the outside of the arm to the wrist bone | Guides differ on the arm position; Sizeguide.net bends the elbow with the hand on the hip, Outdoor Equipped holds the arm straight out to the side | Dress shirt sleeve length |
| Inseam | From the crotch seam down the inside of the leg | Stand straight; Men’s Wearhouse measures to the top of the dress shoe, or to the ankle bone without shoes | Trouser length |
| Shoulder | From the bony tip of one shoulder to the other, across the back | Someone else holds the tape | Jacket fit, made-to-measure |
For the chest, Outdoor Equipped‘s instruction is to “wrap the tape beneath his armpits, fully encircling his body around the widest portion of his chest”, with the arms hanging at the sides, and Men’s Wearhouse adds “breathe normally and don’t puff out your chest”.
Waist, twice. The natural waist is the number for suit and dress trousers, which sit higher; Outdoor Equipped finds it by bending the torso to the side and finding the crease, and says the natural waist measurement is best for trousers or high-rise trousers. The trouser waist is the number for jeans and casual trousers, which Outdoor Equipped says mostly sit much lower today, just above the hip, and its rule is to “measure the waist where you want the waistline of your pants to sit”. Men’s Wearhouse warns against measuring too low, because “suit trousers sit higher on the waist than most jeans”.
Neither waist has to be the narrowest point of your torso. If your abdomen is fuller than your natural waist, record that reading separately rather than using it as either waist, so you can compare it with a chart that asks for it.
At the seat, “wrap the tape around the widest part of the hip and buttock”, in Outdoor Equipped’s words.
Measure the neck at the base, and Outdoor Equipped’s method is to “place the tape just below the Adam’s apple, where the neck joins the shoulder muscles” with a finger between tape and neck so the tape is not too snug. The finger keeps the tape from reading tight; it does not tell you how much room a collar is cut with, which varies by maker, so where a brand’s chart says how to measure the neck or how much to add, follow the brand.
The sleeve comes in two versions, and they are different numbers; the dress-shirt sleeve runs from the centre of the back of the neck, which Outdoor Equipped describes as “from the center of his upper back…to his shoulder, and then all the way down his arm to the wrist bone”, while the jacket sleeve runs “from the tip of the shoulder…down the outside of the arm to the wrist bone”. Outdoor Equipped says the first is most commonly used for shirts and the second for jackets, but Men’s Wearhouse measures a suit sleeve from the centre of the neck, so check which one a chart asks for.
Men’s Wearhouse measures the inseam from “the highest point of your inner thigh, where the crotch seam rests” down to “the top of your dress shoes”; a pair of trousers that fits well is easier to measure than a leg, which is the next section.
For the shoulder, Men’s Wearhouse’s method needs a helper to “place one end of the measuring tape on the bony tip of your shoulder, where your arm begins” and run it “along the natural curve of your body to the same point on your other shoulder”, standing naturally without rounding forward.
The sizes
What the numbers on the label mean
Suits and jackets
Chest plus height
A suit or jacket size is the chest measurement in inches plus a length letter. Men’s Wearhouse says that “for most men, the size of your chest becomes the size of your jacket”, and its height bands are S for 5 foot 4 to 5 foot 7, R for 5 foot 8 to 6 foot, and L for 6 foot 1 to 6 foot 4; so 40R is a 40-inch chest for a man between 5 foot 8 and 6 foot.
The drop is the difference between the jacket size and the trousers it is sold with. Oliver Wicks, a made-to-measure maker, calls a six-inch drop the industry standard for ready-to-wear, so a 40 jacket comes with 34 trousers; treat that as a starting point and check the chart of the suit you are buying. If your own difference does not match it, buy the jacket and trousers separately or have the trousers altered, which our guide to what a tailor can change on a suit covers.
Dress shirts
Collar and sleeve
A US dress shirt size is two numbers, the collar and the sleeve, both in inches. Sizeguide.net’s shirt chart runs the collar in half-inch steps from 14 to 18, and its advice is to round your neck measurement up to the nearest whole or half size, so a 16.3-inch neck takes a 16.5 collar.
Some makers label the sleeve as a range such as 34/35. Paul Fredrick, a shirtmaker, explains that a shirt sold that way is cut with the longer sleeve, 35 inches in that example, with an extra cuff button to take up the difference, while an exact-sleeve shirt is cut to one length.
Collar room differs too. Sizeguide.net expects one or two fingers between the neck and the buttoned collar, and some makers state their own allowance on the chart; where they do, follow theirs.
Alpha sizes (S, M, L) on casual shirts are set by each brand and are not standardised. As a rough orientation only, Sizeguide.net’s US chart puts a 35 to 37 inch chest in a small, 38 to 40 in a medium, 42 to 44 in a large and 46 to 48 in an extra large, and warns that sizes may differ notably between brands; read the brand’s own chest range, and use the garment method below where no chart is given.
Trousers and jeans
Waist by inseam
US trousers are labelled waist by inseam, 34×32 for a 34-inch waist and a 32-inch inseam. Wikipedia’s summary is that the nominal inseam is fairly accurate while the nominal waist may be quite a bit smaller than the actual waist in US sizes, so a man who measures 36 at the trouser waist may find that a 34 in one brand and a 36 in another both fit. The 2010 Esquire sample, in which trousers labelled 36 measured 37 to 41 inches, shows how wide that gap has been; how wide it is in a given brand today can only be found by measuring the waistband.
Try the size that matches your measured waist first, and judge it by how the waistband sits on you rather than by the number on the label.
The better method
Measure a garment that fits
Body measurements convert to sizes through each brand’s assumptions about ease, and those differ; a shirt or a pair of trousers that already fits you well is a record of the ease you like, so measuring it removes the conversion.
For a shirt, button it, lay it flat, and measure the chest straight across from armpit to armpit, the length from the base of the collar to the hem, the shoulder from seam to seam, and the sleeve from the shoulder seam to the cuff. Write the chest down as a flat width, not a circumference.
With trousers, button them, lay them flat with the front and back waistband edges together, and measure the waist straight across, the seat across the widest point, the inseam from the crotch seam to the hem, and the leg opening across the hem. The waist, seat and leg opening are flat widths too.
Compare with the brand’s garment chart where the retailer publishes one, and compare like with like. A garment chart may give flat widths or circumferences, so check which before you compare, and double a flat figure only if the chart’s own method says to. Buy the size whose garment measurements are closest to your good shirt or trousers, and ignore the size name.
Keep the numbers. Write the eight body measurements, any extra abdomen reading, and the garment measurements of one good shirt, one good pair of trousers and one good jacket in your phone, in inches and centimetres, with the date, and measure your body again whenever your weight or training changes.
The mistakes
What goes wrong
Measuring over a jumper or a thick shirt adds the thickness of the cloth to every circumference; Outdoor Equipped advises measuring on bare skin, and Men’s Wearhouse clothing that sits close to the body, such as a slim-fit T-shirt or dress shirt.
Pulling the tape tight to get a smaller number gives a smaller garment, and the number returns as a button that will not close; Outdoor Equipped’s standard is a tape tight enough to stay straight and level but not so tight that it compresses the skin.
Measuring the trouser waist at the natural waist, or the other way round, gives the right number for the wrong trousers.
Trusting the size you wore at twenty-five; the tape, not the memory, decides.
For how the clothes should fit once they are on, the men’s fitting guide covers the fit checks for jackets, shirts and trousers, and the dress trousers guide covers the trouser rise and break.
Questions readers ask
Common questions
Is a 32 waist actually 32 inches?
Often not. In a 2010 sample of US retailers, dress trousers labelled 36 measured between 37 and 41 inches at the waistband. That sample says nothing reliable about what a 32 measures in a particular brand today, and the only way to know is to lay the waistband flat, measure it, and compare it with the brand’s chart on the same basis.
How do I measure my waist for pants?
Where the waistband will sit. For suit and dress trousers that is the natural waist, which Men’s Wearhouse places just above the belly button; jeans and many casual trousers sit lower. Keep the tape snug and level; Men’s Wearhouse leaves room to slide one finger underneath.
What suit size am I?
Your chest measurement in inches plus a height letter, so a 42-inch chest at 5 foot 10 is a 42R on Men’s Wearhouse’s height bands. Check the waist of the trousers the brand pairs with it against your own natural waist, and alter or buy separately if they differ.
How do I measure my sleeve length for a dress shirt?
From the centre of the back of the neck, over the point of the shoulder, down the outside of the arm to the wrist bone. A shirt sold as 34/35 is, in Paul Fredrick’s explanation, cut with the 35-inch sleeve and an extra cuff button.
Should I measure my body or my clothes?
Both. Measure the body once for the eight numbers a tailor or a made-to-measure form asks for, and measure one well-fitting shirt and pair of trousers for buying online against a brand’s garment chart, which lets you compare garment with garment.
Sources checked for this article (13 September 2026, re-checked 12 October 2026)
- Men’s Wearhouse, How to measure yourself for a suit: find your perfect fit, 13 July 2026, https://www.menswearhouse.com/blog/all-about-mens-suits/how-to-take-suit-measurements/
- Sizeguide.net, Measure your size, men, https://www.sizeguide.net/measure-your-size-men-clothing.html
- Sizeguide.net, Shirt sizes, men, https://www.sizeguide.net/shirt-sizes-mens.html
- Sizeguide.net, Men’s size chart, US sizes, https://www.sizeguide.net/size-guide-men-size-chart.html
- Outdoor Equipped, How to correctly measure for men’s clothing sizes, https://www.outdoorequipped.com/pages/how-to-correctly-measure-for-mens-clothing-sizes
- Wikipedia, Vanity sizing (citing Abram Sauer, Esquire, 2010), https://en.wikipedia.org/wiki/Vanity_sizing
- Oliver Wicks, How to measure and understand men’s suit sizes, updated 15 November 2025, https://www.oliverwicks.com/article/suit-size
- Paul Fredrick, Exact versus average sleeve length dress shirt sizing, https://www.paulfredrick.com/blogs/news/exact-versus-average-sleeve-length-dress-shirt-sizing
Mandy Meyer’s focus at The VOU is men’s body-shape styling, garment fit and outfit proportions. Her coverage addresses the practical questions behind a wardrobe choice: how a jacket sits across the shoulders, how trousers fall and how different cuts change the silhouette a wearer wants to create.
Her subject areas include the triangle, inverted triangle, rectangle, oval, trapezoid, hourglass and diamond labels used in body-shape styling. These provide starting references for comparing visible proportions; they do not capture every body or prescribe one correct way to dress. The focus connects those observations with garment shape, construction, length and the relationship between the upper and lower parts of an outfit.
Mandy’s editorial coverage combines visual comparisons with fit checks for comfort and movement. Readers can consider whether a cut gives them the room they need, where clothing pulls or gathers and which changes might support their preferred look. The aim is to make menswear choices more understandable while keeping personal preferences and the wearer’s own styling goals central.
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