Apparel Sizing EngineASTM D5585 & EN 13402Collar (Inches) ⇄ EU Collar (cm) / Alpha

Men's Dress Shirt Size Converter

Direct Answer Summary

Men's dress shirt sizes are determined primarily by neck collar circumference. A US and UK 15.5-inch collar translates to an EU 39 or 40 centimeters, corresponding to a standard Medium (M) chest. Dress shirts also designate sleeve length (e.g., 34/35 inches) measured from the center back collar down to the wrist.

Convert men's dress shirt collar sizes between US/UK inches and European centimeters with sleeve length and chest fit guides.

Live Interactive Island

Collar (Inches) to EU Collar (cm) / Alpha Calculator

15.5″ (39.5 cm)
Shirt Size Result
15.5″ CollarEU: 39.5 cm (M)
US / UK Collar

15.5

EU Collar

39.5 cm

Chest Estimate

38-40

ASTM D5585 & EN 13402 garment sizing standards with anatomical cross-grading.

Bookmarkable Calculation:
Women's UK vs US

Add 4 to US Size

Standard women's dresses convert by adding 4 to the US number (e.g. a US 6 is a UK 10; a US 8 is a UK 12).

Women's EU vs US

Add 30 or 32

French/EU dress sizing adds 30 to 32 to the US size (e.g. US 6 equals EU 38, US 8 equals EU 40).

Men's Suits & Jackets

Add 10 for Continental EU

Men's chest numbers match in the US and UK (size 40). Continental EU adds 10 (US 40 equals EU 50).

Clothing SizePrint-Optimized (A4 & US Letter)

Men's Dress Shirt Size Converter Reference Table

Verified ASTM D5585 & EN 13402 International Apparel Matrix

Official Standards

International Apparel Size Conversion Chart.

Cross-reference international apparel sizing comparing US, UK, European (EU), and International Alpha standards according to ASTM D5585 and EN 13402 specifications.

Women's Apparel & Dress Sizing(Bust, Waist & Hip Range)

US SizeUKEUAlphaBust (in / cm)Waist (in / cm)Hips (in / cm)
00230XXS30″ (76 cm)23″ (58 cm)32″ (82 cm)
0432XXS31″ (79 cm)24″ (61 cm)33″ (84 cm)
2634XS32″ (82 cm)25″ (64 cm)35″ (89 cm)
4836S34″ (86 cm)27″ (69 cm)37″ (94 cm)
61038S35″ (89 cm)28″ (71 cm)38″ (97 cm)
81240M37″ (94 cm)30″ (76 cm)40″ (102 cm)
101442M38.5″ (98 cm)31.5″ (80 cm)41.5″ (106 cm)
121644L40″ (102 cm)33″ (84 cm)43″ (110 cm)
141846L42″ (107 cm)35″ (89 cm)45″ (115 cm)
162048XL44″ (112 cm)37″ (94 cm)47″ (120 cm)
182250XXL46″ (117 cm)39″ (99 cm)49″ (125 cm)
2024523XL48″ (122 cm)41″ (104 cm)51″ (130 cm)

Men's Suits, Jackets & Tops(Chest & Waist Circumference)

US / UK ChestEU SizeAlphaChest (in / cm)Waist (in / cm)
3444XS34″ (86 cm)28″ (71 cm)
3646S36″ (91 cm)30″ (76 cm)
3848M38″ (96 cm)32″ (81 cm)
4050M40″ (102 cm)34″ (86 cm)
4252L42″ (107 cm)36″ (91 cm)
4454L44″ (112 cm)38″ (97 cm)
4656XL46″ (117 cm)40″ (102 cm)
4858XXL48″ (122 cm)42″ (107 cm)
50603XL50″ (127 cm)44″ (112 cm)
Common Questions

Frequently Asked Questions.

Expert answers regarding apparel fit, garment dimensions, and international fashion sizing.

How do I measure my collar size for a dress shirt?

Wrap a measuring tape around the base of your neck where the collar sits, placing two fingers beneath the tape for comfortable breathing allowance.

What collar size corresponds to a Men's Large shirt?

A Men's Large (L) shirt typically features a 16.0 or 16.5-inch collar (EU 41-42 cm).

What is the difference between Slim Fit, Athletic Fit, and Classic Fit shirts?

Classic fit has fuller torso cuts; athletic fit offers broad shoulders with a tapered waist; slim fit features back darts and narrower armholes.

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