Clothing Size Converter
Clothing sizes are among the least standardised measurements in everyday life: a US 8 dress, a UK 10 and an EU 38 are close but not identical, and men’s jackets are sized by chest in inches in the US and UK but by half-chest in centimetres in the EU. Ordering clothes across borders without converting means frequent returns. This converter takes a chest or bust measurement and returns the size for the region you are shopping in.
The target region follows the language you are viewing the site in — English defaults to US, German and French to EU, Japanese to JP, Chinese to CN — and you can switch it with the selector. Enter your chest (for men’s jackets) or bust (for women’s dresses and tops) in centimetres, pick the garment type, and read the size for your region.
It is the conversion that turns a chest measurement into the right label for the country you are shopping in — because a US 8, a UK 10 and an EU 38 are close but not the same, and ordering blind across borders is how wardrobes fill with returns.
Enter your values to see the result.
How this is calculated
The converter starts from a chest or bust measurement in centimetres. For women’s dresses and tops, the standard mapping is built around a 80 cm bust equalling US 4 / UK 8 / EU 36, with each 2 cm step moving one size: US = (bust − 80) ÷ 2 + 2, UK = (bust − 80) ÷ 2 + 6, EU = (bust − 80) ÷ 2 + 34, JP = (bust − 80) ÷ 2 + 5. China and Italy use the EU numeric scale. The result is rounded to the nearest half size, matching how women’s dress sizes step.
For men’s jackets and suits, the systems differ in kind, not just offset. The US and UK size a jacket by the chest in inches, so US = UK = chest cm ÷ 2.54, rounded. The EU and Italy size by half the chest in centimetres, so EU = chest cm ÷ 2 (a 100 cm chest gives EU 50). Japan runs about 10 below the EU number, and China uses the EU-equivalent. The converter labels the US and UK output as chest-inches so the unit is clear.
The target region defaults to the site language — English to US, German, French, Spanish, Italian and Portuguese to EU, Japanese to JP, Chinese to CN — because clothing sizing is regional and a visitor usually wants the system used where they shop. A selector overrides it for cross-border shopping. The formulas give the standard mapping, but brands vanity-size and cut differently, so the same number can fit differently across labels; treat the result as a guide and check the brand’s size chart for anything between sizes or close-fitting.
Worked example
Your bust is 92 cm. You are viewing the site in German (EU default) but want the US dress size.
- 1EU = (92 − 80) ÷ 2 + 34 = 6 + 34 = EU 40.
- 2US = (92 − 80) ÷ 2 + 2 = 6 + 2 = US 8.
- 3UK = (92 − 80) ÷ 2 + 6 = 6 + 6 = UK 12.
- 4JP = (92 − 80) ÷ 2 + 5 = 6 + 5 = JP 11.
- 5The headline reads EU 40; switch the selector to US and it reads US 8.
Frequently asked questions
- Why does the default region change with my language?
- Because clothing sizing is regional. A visitor reading the site in German almost always shops in EU sizes; one reading in Japanese shops in JP. The converter defaults to the region that matches your site language, then lets you switch to any other with the selector.
- Should I measure chest or bust?
- For men’s jackets, measure around the fullest part of the chest with arms relaxed. For women’s dresses and tops, measure around the fullest part of the bust. Keep the tape snug, not tight, and wear light clothing.
- Are clothing sizes really this consistent?
- The formulas give the standard mapping, but brands vanity-size and cut differently, so the same number can fit differently across labels. Use the result as a guide and check the brand’s size chart for anything between sizes or close-fitting.
- Why does the default region change when I switch the site language?
- Because clothing sizing is regional. A German visitor almost always shops in EU sizes; a Japanese visitor in JP. The converter reads your site language and defaults to the matching region, so the first result is the locally correct one. You can still switch to any system with the selector.
- Why are men’s and women’s sizes handled differently?
- Because the systems differ in kind. Women’s dress sizes are offset letter/number scales (US 8, UK 10, EU 38) that share a common step. Men’s jackets are sized by chest — in inches in the US and UK, in centimetres (halved) in the EU — so the conversion is between measurement systems, not just between offset scales.
Related calculators
Method: standard women’s dress-size mappings (US/UK/EU/JP/IT/CN by bust) and men’s jacket-size mappings (chest in inches for US/UK, chest cm ÷ 2 for EU/IT). Region defaults follow the site language. Last updated: September 2026.
These results are general estimates from established formulas and conversion factors. Paint coverage, tile yields, concrete volumes, fuel economy, oven behaviour and clothing and shoe sizes vary by product, surface, vehicle, oven and brand. Always confirm with your supplier, the product label or the brand’s own size chart before buying or acting on a calculation.