How to Measure Shoulder Width:
For Perfect Jacket Fit
Master the professional technique for measuring shoulder width. Essential for custom suits, jackets, and shirts that fit perfectly across the shoulders.
What is Shoulder Width?
Shoulder width (also called shoulder breadth) is the distance measured straight across your back from the outer edge of one shoulder to the outer edge of the other shoulder. This measurement determines where jacket and shirt shoulder seams sit on your body.
Proper shoulder fit is the most important aspect of jacket fit - it's nearly impossible to alter significantly after construction. Unlike sleeves or waist, shoulders must be right from the start.
Why Shoulder Measurement Matters
- âImpossible to alter - Shoulder construction is permanent in most jackets
- âAffects silhouette - Wrong shoulders make the entire jacket look ill-fitting
- âImpacts comfort - Too narrow restricts movement, too wide looks sloppy
- âDefines your look - Proper shoulders create a professional, tailored appearance
How to Measure Shoulder Width: Step-by-Step
What You'll Need:
- Flexible fabric measuring tape
- A helper (strongly recommended - very difficult to do alone)
- Form-fitting shirt (optional, helps locate shoulder points)
Stand Naturally
Stand up straight with your shoulders relaxed in their natural position. Don't pull your shoulders back or push them forward. Arms should hang naturally at your sides. Remove bulky clothing - measure over a thin shirt or bare skin.
Locate Shoulder Points
The shoulder point is where your shoulder bone ends and your arm begins. To find it:
- âą Feel along the top of your shoulder bone (acromion)
- âą Find where it ends at the edge of your shoulder
- âą This is where suit jacket shoulder seams should sit
- âą Look at a well-fitting jacket for reference if needed
Measure Across Back
Have your helper measure straight across your back from one shoulder point to the other:
- âą Keep the measuring tape parallel to the floor
- âą Tape should lay flat across your back (not droop)
- âą Don't pull tape tight - it should rest gently on your back
- âą Record measurement in inches or centimeters
Pro tip: Measure 2-3 times to ensure consistency. The measurement should be the same within 1/4 inch each time.
Average Shoulder Width by Height
| Height | Shoulder Width (inches) | Shoulder Width (cm) |
|---|---|---|
| 5'4" - 5'6" | 16" - 17" | 41 - 43 cm |
| 5'7" - 5'9" | 17" - 18" | 43 - 46 cm |
| 5'10" - 6'0" | 18" - 19" | 46 - 48 cm |
| 6'1" - 6'3" | 19" - 20" | 48 - 51 cm |
Common Mistakes
Measuring over thick clothing
Bulky sweaters or jackets add extra width. Measure over thin shirt or bare skin.
Pulling shoulders back unnaturally
Stand naturally. Forced posture gives inaccurate measurements.
Measuring from front
Always measure across the back for accurate shoulder width. Front measurements are unreliable.
Eight tailoring traditions, one body
Bone to bone â every tradition agrees. The acromion is the bump you can feel.
This guide was built from published primary sources in 8 tailoring traditions â every URL is cited inline and listed in the Sources block below. If any claim doesn't match the source it's tied to, email nathantailorshoian@gmail.com and we'll fix it the same day.
Shoulder width is acromion-to-acromion across the back â bony point to bony point â in every tradition surveyed. The acromion is the small bump you can feel with your finger at the very edge of your shoulder where it meets your arm. That's the landmark. Not the deltoid (the muscle), not the "ball of the shoulder" (the soft tissue) â the bone point.
Where the traditions diverge slightly: Japanese protocol passes the tape through the C7 vertebra at the back of the neck (so the tape arcs over the top of the spine), reading ~0.5-1 cm larger than the straight British line for the same body. Both methods produce a usable pattern because each tradition's draft is calibrated to its own measurement convention.
And there's a separate measurement easily confused with shoulder width: cross-back (the distance between the armpit creases, going across the shoulder blades). MĂŒller and Aldrich both require both numbers. Most English-language self-measurement content conflates them, which is why off-the-rack jackets often fit fine across the shoulders but pull across the back.
đ»đłVietnamese
From the bony point of one shoulder to the other, straight across the back. The Vietnamese convention is body-shape-adaptive: for thin people, tape directly between the shoulder bones; for heavier or larger builds, outside the shoulder bones plus about 2 cm total ease.
đŹđ§British / Savile Row
Acromion to acromion across the back, parallel to the ground, tape taut but not pulling the shoulders back.
đźđčItalian
Same acromion-to-acromion landmark. Italian houses cut narrower in the shoulders by 1-2 cm relative to Savile Row â the body number is identical, the pattern derivation differs.
đșđžAmerican
Same landmark. American sources explicitly warn against the common error of measuring to the "ball of the shoulder" (the deltoid bulk) instead of the acromion bone point, which can over-read by 2-3 inches.
đŻđ”Japanese
Two distinct protocols: for the body, tape passes from the bone point at the right shoulder, through the bone projection at the base of the neck (C7), to the bone point at the left shoulder â i.e. the tape arcs, not a straight line. For flat-laid garments, straight seam-to-seam.
đ©đȘGerman (MĂŒller)
MĂŒller measures Schulterbreite (acromion to acromion across the back) AND separately RĂŒckenbreite (cross-back, between the armpit creases). Two distinct measurements where most traditions use one.
Most common self-measurement mistake
Measuring to the "ball of the shoulder" (the deltoid muscle bulk) instead of the acromion bone point. The acromion is the small bump you can feel at the top edge of your shoulder where it meets your arm. Bone, not muscle â every tradition is on the same page here.
Anatomical anchor
Average male shoulder width: 45-48 cm. The Japanese C7-arched protocol reads about 0.5-1 cm larger than the British straight-line protocol for the same body â both numbers are valid because each pattern system is internally calibrated.
Sources: Y-Aoyama (Japanese suit chain) · Tailor Wiki
Sources & references
Every claim above traces back to one of these
This guide was built from primary sources in 10 tailoring traditions â Vietnamese local convention first, then British, Italian, American, Japanese, Korean, French and German pattern systems, plus anthropometric standards (SizeUSA, SizeUK, JIS L4004). Click any to read the original.
đ»đł Vietnamese
- Custom tailor Hoi An â 24-hour professional processCustom Tailor Hoi AnHá»i An 24-48h workflow â pattern â fabric â measurements â try-on. Practical / finished-garment orientation.
- Quy trĂŹnh Äo may vest theo sá» ÄoThegioivestnamVietnamese-language vest measurement protocol â body shape adaptive convention.
- How to measure men's Ăo DĂ iAlis CollectionĂo dĂ i tradition: shoulder-bone to wrist-bone with slight elbow bend; bicep measured on the same pass.
đŹđ§ British / Savile Row
- Huntsman Savile Row â size guideHuntsman, Savile RowInseam: fork to "below the ankle bone." Anatomical anchor is the bone, not the floor.
- Bespoke trousers â all you need to knowApsley Tailors, Savile RowSavile Row trouser protocol; landmark-based measurement convention.
- The definitive guide to shirt sizing and measuringHarvie & Hudson, Jermyn StreetBritish shirtmaker sleeve convention â distinct from the American center-back method.
- What shirt size am I?Savile Row Co.British chest protocol â arms by sides, neutral breath, parallel to floor.
đźđč Italian
- Neapolitan tailoringWikipediaOverview of the Neapolitan tradition (Rubinacci, Attolini, Kiton lineage) and house transmission of conventions.
- The history and anatomy of Neapolitan tailoringThe RakeNeapolitan finished cut conventions: shorter sleeve so shirt cuff peeks; spalla camicia construction.
- Come prendere le misureSartoria Rossi (Italian)Italian-language measurement protocol â landmark conventions identical to British, finished cut narrower in shoulders.
đșđž American
- Brooks Brothers â suit measurementsBrooks BrothersCodified American measurement protocol; garment-derived more than body-derived.
- Brooks Brothers â dress shirt size guide (16/34 system)Brooks BrothersThe American dual-number sleeve sizing convention (neck/sleeve, e.g. "16/34") â the source of the cross-tradition confusion.
- How to measure neck size for dress shirtsThe Tie BarAmerican "two-finger" rule for neck collar measurement â ease built into measurement, not pattern.
- How to measure your body â bicepProper ClothAmerican bicep protocol â arm relaxed (NOT flexed) for tailoring; 1-2 fingers ease added.
- 3 steps â how to measure sleeve lengthNimble MadeAmerican sleeve protocol â center-back-neck through shoulder, elbow, to wrist.
đŻđ” Japanese
- JIS L4004:2001 â adult men's clothing sizingJapan Industrial StandardsJapanese national standard. Chest, waist, and height are primary measurements. Based on ISO 3636:1977 with Japanese modifications.
- SOLIT! Japanese measurement guideSOLIT!Japanese precision-millimetre measurement convention â matagshita (inseam) treated as a primary measurement.
- Yukata / yuki measurement conventionWikipedia (cross-reference)Background on yuki â the kimono sleeve-length convention measured at 45° from C7 over shoulder to wrist. Foundational to modern Japanese yĆfuku tailoring.
- Shoulder-width protocolY-Aoyama (Japanese suit chain)Japanese convention: tape passes through C7, not in a straight line â reads ~0.5-1cm larger than British convention for the same body.
đ°đ· Korean
- Korean sleeve measurement (ì맀ꞞìŽ)GentlistKorean shops adopted American center-back-to-wrist for dress shirts post-1953 US military influence. Add 5-10cm ease at measurement (Korean industry convention).
- Uniqlo Korea â inseam (ìžìŹ) protocolUniqlo KoreaKorean inseam = inner-leg seam measured on a reference garment laid flat. Body-only protocol mirrors Japanese tradition.
đ«đ· French
- Normes et standards â prendre ses mesuresLa Bonne Taille (French)French inseam (longueur d'entrejambe): top of inner thigh to bottom of feet. Floor is the lower anchor, not the ankle bone.
- Choix de la taille homme â longueur d'entrejambeBioMidiFrench-language inseam protocol with string-substitute method.
đ©đȘ German (MĂŒller)
- Fundamentals Menswear (textbook)MĂŒller & Sohn, in publication since 1891The German pattern-construction tradition's reference textbook. Measurements sequenced as they enter pattern construction.
- Measurement charts for menswearMĂŒller & SohnMĂŒller pattern system measurement charts â codifies multiple decomposed measurements where most traditions use one.
- KonfektionsgröĂen â German clothing sizesGermanwearGerman size convention: men's size = chest girth Ă· 2 (100cm chest â size 50). DOB for women: (chest â 12) Ă· 2.
đ Anthropometric / Standards
- SizeUK survey overviewScienceDirectSizeUK (2001-2002): 5,500 men scanned in 3D, ~140 measurements per subject. Foundation of modern UK anthropometric data.
- SizeUSA â ethnicity and BMI body shape studyFashion and Textiles (Springer)SizeUSA scan data analyzed by ethnicity â chest, waist, and other regional variations.
- Human height â global dataOur World in DataAdult male average height by country (used to triangulate inseam and shoulder-width norms).
- Body proportionsWikipediaLeg-to-torso ratio differences by population â East Asian: shorter legs ratio; Sub-Saharan African: longer legs ratio.
đ Cross-tradition reference
- British, American, and Italian tailoring â a comprehensive guideWestwood HartCross-tradition synthesis of style and measurement convention differences.
- Types of measurementTailor WikiThe cross-back vs cross-shoulder distinction â different anatomical landmarks routinely conflated in English content.
Get Custom Jackets with Perfect Shoulders
Save your shoulder measurements with Nathan Tailors and get custom suits and jackets with perfect shoulder fit - tailored in Hoi An, Vietnam.
Save Your Measurements â