Apparel Sizing EngineASTM D5585 & EN 13402UK Men's ⇄ US Men's

UK to US Men's Clothing Size Converter

Direct Answer Summary

Men's suit and jacket sizes are identical between the UK and US, as both utilize imperial chest measurements in inches (a UK 40 jacket equals a US 40). Men's trouser waist sizes also match directly in inches, while dress shirts share identical collar circumference numbers across British and American tailoring.

Convert UK men's suits, shirts, and trousers to US sizes with chest measurements in inches and centimeters.

Live Interactive Island

UK Men's to US Men's Calculator

Primary Converted Fit
US 40Brasil: 42 (M)
Anatomical Bust/Chest40(102 cm)
Brasil (BR)

42 (M)

Padrão Nacional
US Size

40

Suit/Chest
UK Size

40

British Standard
EU Size

50

Continental Europe
Alpha Scale

M

Universal Alpha
Target Body Dimensions
Bust / Chest

40″ (102 cm)

Natural Waist

34″ (86 cm)

Full Hips

40″ (102 cm)

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)

UK to US Men's Clothing 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.

Are UK and US men's suit sizes the same?

Yes, both UK and US men's suits and blazers are measured by chest circumference in inches (e.g., 38R, 40R, 42L).

What is a UK men's size 40 jacket in European sizing?

A UK/US size 40 chest corresponds to a European size 50 (add 10 to UK chest size).

Do UK trousers fit differently than US pants?

While waist measurements in inches are identical, British tailoring often features a closer, higher-rise silhouette compared to traditional American relaxed cuts.

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