How to measure a dress shirt
Every point, drawn on the garment so there is no guessing where the tape goes.
Quick answer
Lay the dress shirt flat and measure nine points: chest, length, shoulder, sleeve (upper, lower and cuff), waist, hem and neck, in that order of fit-impact. Buyers judge it by chest and neck, so measure the collar laid open, button to buttonhole center. Tap each step on the diagram to see where the tape sits.
Someone buying a dress shirt checks the chest first, then the collar and cuff, because a shirt that gauges right at the body still strangles at the neck. There are nine points in all. Most listings show a size letter and a sleeve length, then stop. This page maps every point on the actual garment, so the buyer measures the same spots you did.
- A
Chest
The first number a buyer checks, taken straight across the body one inch below where the sleeve seams meet. Hover or tap this step to see the exact line. On a slim-fit shirt the chest pulls in, so an accurate read here prevents a tight buttoned front.Double it for the full chest circumference.
- B
Length
One vertical run from the highest point of the shoulder down to the bottom hem. Tap the step to see where the line starts, so you follow the garment seam and not the placket buttons. Length tells a buyer whether the shirt tucks or wears out.Recorded as-is. Do not double.
- C
Shoulder
Seam to seam across the back, from one shoulder point to the other. This sets how square the shirt sits before the sleeves drop, and it is the hardest measurement to fudge on a tailored shirt.Recorded as-is. Do not double.
- D
Sleeve A
The upper sleeve run, from the shoulder seam toward the elbow. Splitting the sleeve into two parts keeps a long dress-shirt sleeve from hiding in one rounded figure.Recorded as-is. Do not double.
- E
Sleeve B
The lower sleeve run, from where the upper sleeve ends down to the cuff. Together with Sleeve A this gives the full reach a buyer feels at the wrist.Recorded as-is. Do not double.
- F
Cuff
Across the buttoned cuff at the end of the sleeve. On a dress shirt this decides whether the wrist closes cleanly over a watch, so tap the step to see the precise span.Double it for the cuff circumference.
- G
Waist
Across the body at its narrowest point, usually a few inches below the chest. A tailored shirt nips in here; a classic-fit shirt reads close to the chest.Double it for the full waist circumference.
- H
Hem
Across the bottom opening of the shirt. A wider hem leaves room to tuck without bunching; a trimmer hem stays flat under a jacket.Double it for the full hem circumference.
- I
Neck
Lay the collar open and flat, then measure along the band from the center of the button to the center of the buttonhole. This is the number a buyer reads as their collar size, so accuracy here matters more than on any other shirt.Recorded as-is along the collar band. Do not double.
Always measure flat, never stretched, with the shirt buttoned and smoothed so the placket lies straight. The four across measurements (chest, waist, hem and cuff) double to a body circumference. Length, shoulder and the two sleeve runs are single passes recorded exactly as taken. Neck is the one buyers convert to their collar size, so read it carefully.
Dress shirt size reference
| Size | Chest | Length | Shoulder | Sleeve | Neck |
|---|---|---|---|---|---|
| S | 20 | 29 | 17.5 | 33 | 15 |
| M | 21.5 | 30 | 18 | 34 | 15.5 |
| L | 23 | 31 | 18.5 | 35 | 16 |
| XL | 25 | 32 | 19.5 | 36 | 17 |
| 2XL | 27 | 33 | 20.5 | 36.5 | 17.5 |
Frequently asked
How do I find my dress shirt collar size from a flat measurement?
Lay the collar open and measure along the band from the button center to the buttonhole center. That figure in inches is the collar size, so a 15.5 inch band is a 15.5 collar. Unlike chest or waist you do not double it, because the band already runs the full neck. For the full US, UK and EU conversion see our men's international size chart.
Which dress shirt measurements do I double and which stay as they are?
Double the four across measurements: chest, waist, hem and cuff, since each is taken across one flat layer and the body wraps both sides. Keep length, shoulder, the two sleeve runs and the neck exactly as measured, because each is a single pass along the garment rather than across it.
What is the difference between dress shirt sleeve length and the two sleeve parts?
A traditional dress shirt sleeve length runs from the center back of the collar, over the shoulder, to the cuff. Sizely splits the arm into an upper run (Sleeve A) and a lower run (Sleeve B) measured on the laid-flat sleeve, which is easier to take with one tape and harder to round off. Add the two if a buyer asks for a single sleeve number.
What size dress shirt am I if my chest measures 42 inches?
A 42 inch body chest is usually a large in standard men's sizing, which lands near a 21 inch flat chest on the garment, but collar and sleeve drive dress shirt sizing as much as chest. Always check the neck and sleeve against your own measurements, since two large shirts can differ by a full collar size between brands.
Should I measure a dress shirt in inches or centimeters?
Either is fine as long as you stay consistent and label the unit on the chart. Collar sizes are quoted in inches in the US and UK and in centimeters across most of Europe, so a seller shipping internationally does best listing both. Sizely shows both units on every chart so no buyer has to convert in their head.
Related size charts & tools
Men's international size chart
Women's international size chartSources: Sizely garment engine, spec #81 (Dress Shirt Male), nine named measurement points. ISO 8559 garment-measurement reference (representative ranges only). Last verified June 2026.
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