Adam & Westcott Size Chart: What S to 3XL Actually Measures (2026)
Every Adam & Westcott shirt publishes its own chart in inches. Here is what the letters actually measure, and why an L is not one size.
Last updated: September 2026
A size L shirt at Adam & Westcott measures 44.9 inches around the chest on the typical product, but across the full shirt range an L runs anywhere from 37.0 to 50.4 inches. The letter is not the measurement. The chart on the product page is.
The figures come from the charts of 57 live Adam & Westcott shirts.
- What each size measures in inches
- Why the same letter differs between shirts
- How to size from a shirt you own
- How much each size steps up
What does each Adam & Westcott size measure in inches?
On a typical Adam & Westcott shirt the chest measures 41.7 inches at S, 43.3 at M, 44.9 at L, 46.5 at XL and 48.0 at 2XL. These are garment measurements taken flat, not body measurements.
| Size | Typical chest | Chest range across the shirt range | Typical length | Typical shoulder |
|---|---|---|---|---|
| XS | 40.2 in | 34.6 to 43.3 in | 27.6 in | 17.3 in |
| S | 41.7 in | 33.9 to 45.3 in | 28.0 in | 17.7 in |
| M | 43.3 in | 35.4 to 47.2 in | 28.3 in | 18.3 in |
| L | 44.9 in | 37.0 to 50.4 in | 29.1 in | 18.9 in |
| XL | 46.5 in | 38.6 to 52.8 in | 29.5 in | 20.1 in |
| 2XL | 48.0 in | 40.2 to 55.5 in | 30.3 in | 20.5 in |
| 3XL | 52.0 in | 41.7 to 59.1 in | 31.9 in | 21.7 in |
Typical is the median across those charts. The range shows the slimmest and fullest cut.
Why do two Adam & Westcott shirts in the same size measure differently?
Because the cut changes by product. At size L the chest is 42.5 inches on the Cotton Solid Long Sleeve Shirt and 47.2 inches on the Forgeway Classic Workwear Shirt, a 4.7 inch gap inside the same letter.
| Shirt | Chest at L | Length at L | Shoulder at L | Size run | Price |
|---|---|---|---|---|---|
 Cotton Solid Long Sleeve Shirt |
42.5 in | 28.7 in | 18.5 in | M to XL | $49.99 |
 Atelier Drift Long-Sleeve Shirt |
44.1 in | 28.7 in | 21.1 in | S to 2XL | $39.99 |
 CoreOps Button-Up Shirt |
45.7 in | 29.5 in | 18.9 in | S to XL | $49.99 |
 Forgeway Classic Workwear Shirt |
47.2 in | 29.6 in | 21.2 in | S to 3XL | $46.99 |
How do I find my size from a shirt I already own?
Lay a shirt that fits you well flat, measure straight across from armpit to armpit, then double that number. Match it against the chest column and take the closest value, or the next size up for a looser fit.
How much does each Adam & Westcott size step up?
Each step from S to XL adds about 1.6 inches of chest. Over that full run the typical shirt gains 4.8 inches in the chest, 1.5 inches in length and 2.4 inches across the shoulder.
Do Adam & Westcott shirts run big or small?
Neither across the board, which is why the chart matters. The Forgeway Classic Workwear Shirt is 44.0 inches in the chest at S, while the slimmer Cotton Solid Long Sleeve Shirt is 39.4 inches at the same letter.
CoreOps Button-Up Shirt
Best for the standard fit. 100% cotton, dual chest pockets, rollable cuffs. Chest runs 42.5 inches at S to 47.2 at XL.
$49.99. Sizes S to XL.
Forgeway Classic Workwear Shirt
Best for the broadest frame and the longest run. Chest goes 44.0 inches at S to 52.0 at 3XL, with a 22.8 inch shoulder at 3XL.
$46.99. Sizes S to 3XL.
Atelier Drift Long-Sleeve Shirt
Best for a relaxed shoulder at the lowest price. A 21.1 inch shoulder at L against 18.9 on the CoreOps, with chest from 40.9 to 47.2 inches.
$39.99. Sizes S to 2XL.
Which Adam & Westcott shirts go past XL?
23 shirts publish a 3XL measurement and 14 go to 4XL, reaching 61.4 inches in the chest at the top of the range. The Forgeway Classic Workwear Shirt covers S to 3XL, 44.0 to 52.0 inches.
Frequently asked questions
What does 2XL measure at Adam & Westcott?
A 2XL shirt measures 48.0 inches in the chest and 30.3 inches in length on the typical product, with a 20.5 inch shoulder. Across the range 2XL spans 40.2 to 55.5 inches.
What is the XL chest measurement?
XL measures 46.5 inches in the chest on the typical Adam & Westcott shirt, 1.6 inches up from L. On the CoreOps Button-Up Shirt specifically, XL is 47.2 inches.
Are the numbers body measurements or garment measurements?
They are garment measurements taken flat from the finished shirt, so compare them against a shirt you own.
Should I size up at Adam & Westcott?
Only if your number falls between two rows on that product's chart. Because the same letter varies by up to 13.4 inches across the range, read the chart rather than repeating your usual size.
Do all Adam & Westcott shirts publish a chart?
Most do. 57 live shirts carry a chest, length, shoulder and sleeve chart in inches, and that chart always takes priority over any general guide.
Related reading: How a Casual Shirt Should Fit, What Size Sneakers Should I Buy and What Size Belt Should I Buy.
Every chart in this guide sits on its own product page, in inches.