International conversions Nov 22, 2026 3 min read
Men's Shirt Neck Size Conversion (Inches to cm)
US dress shirts use neck inches (15.5"). EU uses cm (39). Multiply inch × 2.54 for cm. Letter sizes (S/M/L) map to neck ranges.
The Chart
| Letter | Neck Inch | Neck cm |
|---|---|---|
| XS | 14-14.5 | 36-37 |
| S | 15-15.5 | 38-39 |
| M | 16-16.5 | 40-42 |
| L | 17-17.5 | 43-44 |
| XL | 18-18.5 | 45-46 |
| 2XL | 19 | 47-48 |
| 3XL | 19.5+ | 49+ |
FAQs
Why dress shirts use neck size?
Dress shirt buttons at the collar — neck circumference is the load-bearing dimension. A 16" neck shirt may have S, M, or L body cut depending on fit (slim, regular, classic).
EU dress shirts also list cm + sleeve?
Yes — EU dress shirts often labeled like 39/87 (neck 39cm, sleeve 87cm). Italian and German shirts use this dual-number system. Always check both numbers when ordering.
Need this on your store?
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