To convert clothing sizes between countries, use the brand's own international chart whenever possible and compare physical body measurements rather than relying only on size numbers. US, UK, European, and international letter sizes are not perfectly standardised, so every conversion should be treated as an approximate starting point.
Estimate a general clothing size from your measurements before comparing international size labels.
Country size numbers differ. Physical chest, waist, and hip measurements provide a more dependable reference.
Why Clothing Size Conversion Is Approximate
Clothing size systems were not created from one universal international standard. Countries and brands use different numbering conventions, pattern blocks, fit assumptions, and target customers.
A US size, UK size, and European size may be presented as equivalents, but their actual chest, waist, and hip ranges can differ between retailers.
Conversion tables are therefore useful starting points rather than guarantees. Physical measurements should remain the primary reference.
The Main Clothing Size Systems
Common systems include US numeric sizes, UK numeric sizes, European numeric sizes, and international letter sizes such as XS, S, M, L, and XL.
Other countries may use their own systems or adapt European, US, or international labels. Some retailers display several systems on the same garment tag.
Men's clothing may use chest, neck, waist, inseam, or jacket numbers, while women's clothing often uses general numeric dress sizes. The meaning of a number therefore depends on the garment category.
Approximate Women's Clothing Conversion Chart
The following table provides broad approximate equivalents. It should not replace a brand-specific measurement chart.
| International | US | UK | EU |
|---|---|---|---|
| XXS | 0 | 4 | 32 |
| XS | 2–4 | 6–8 | 34–36 |
| S | 4–6 | 8–10 | 36–38 |
| M | 8–10 | 12–14 | 40–42 |
| L | 12–14 | 16–18 | 44–46 |
| XL | 16–18 | 20–22 | 48–50 |
| XXL | 20–22 | 24–26 | 52–54 |
Retailers may shift these equivalents by one or more sizes. Confirm the actual bust, waist, and hip measurements before ordering.
Approximate Men's and Unisex Letter Sizes
Men's and unisex clothing frequently uses letter sizes, but the chest ranges behind those letters vary.
| Letter size | Approximate chest | Approximate chest |
|---|---|---|
| XS | 81–87 cm | 32–34 in |
| S | 88–94 cm | 35–37 in |
| M | 95–102 cm | 38–40 in |
| L | 103–110 cm | 41–43 in |
| XL | 111–118 cm | 44–46 in |
| XXL | 119–126 cm | 47–50 in |
These ranges are broad guidance only. A slim-cut brand may use smaller garment dimensions than a workwear or relaxed-fit brand using the same label.
How to Convert US Clothing Sizes to UK Sizes
A commonly used women's conversion adds approximately four to a US numeric size. For example, US 8 is often presented as approximately UK 12.
This is a convenient shortcut, not a universal rule. A brand may label the same measurement range differently.
Compare the brand's bust, waist, and hip ranges after using the numeric shortcut.
How to Convert UK Clothing Sizes to US Sizes
A common women's conversion subtracts approximately four from the UK size. UK 14 is therefore often shown as approximately US 10.
The shortcut works only as an initial estimate. It becomes less reliable when brands use unusual grading or when the garment belongs to a special range.
Petite, tall, maternity, plus-size, junior, and designer collections may follow different proportions.
How to Convert European Clothing Sizes
European numeric sizes commonly use values such as 34, 36, 38, 40, and 42. They do not match US or UK numbers directly.
EU 40 is often presented as approximately US 8 or UK 12, but this relationship varies by brand and garment.
Some European retailers use country-specific systems within Europe. Italian, French, German, and broader EU labels may not always mean exactly the same thing.
How to Use International Letter Sizes
Letter sizes such as small, medium, and large appear simple, but they are not internationally standardised.
A medium may cover a 94–101 cm chest at one retailer and a 98–106 cm chest elsewhere. The same label can therefore produce a noticeably different fit.
Treat the letter as a summary of the measurement row, not as the measurement itself.
Convert the Measurement Unit Before the Size Label
When a chart uses a different unit, convert your physical measurements first. One inch equals exactly 2.54 centimetres.
Multiply inches by 2.54 to obtain centimetres. Divide centimetres by 2.54 to obtain inches.
Comparing measurements in the same unit is more reliable than attempting to convert only the size label.
Step-by-Step International Size Conversion
Take current measurements
Record the chest or bust, waist, hips, and any other dimensions required by the garment.
Choose one unit
Convert all values into centimetres or inches before comparing them.
Use the retailer's chart
Locate the row that contains each relevant physical measurement.
Read the local label
Use the US, UK, EU, or international label attached to the matching measurement row.
Why the Same Conversion Can Produce Different Results
Brands use different pattern blocks and grading increments. One retailer may add 5 cm between sizes, while another adds a different amount.
Fit preferences also vary. A fashion brand may use a close silhouette, while an outdoor or workwear brand may include more room.
Conversion tables normally simplify these differences and cannot represent every garment.
Converting Tops, Trousers, and Dresses
General size conversion should still account for garment type. A converted dress size may not provide the correct trouser waist or shirt neck size.
Tops depend mainly on chest or bust, shoulders, and sleeves. Trousers depend on waist, hips, rise, and inseam. Dresses may need bust, waist, and hips to fit simultaneously.
Use category-specific charts whenever the retailer provides them.
Do Not Confuse Clothing Size with Shoe Size
Shoe size conversions use separate systems and cannot be inferred from clothing conversions.
A US clothing size 8 has no mathematical relationship with a US shoe size 8. The same applies to European clothing and footwear numbers.
Use a dedicated shoe chart based on foot length and width when converting footwear.
Common International Size Conversion Mistakes
- Assuming one conversion table applies to every brand.
- Confusing US and UK numeric size labels.
- Treating EU numbers as direct centimetre measurements.
- Comparing inches with centimetres without conversion.
- Relying on a letter size without checking its measurement range.
- Using a dress conversion for trousers, jackets, or shirts.
- Ignoring petite, tall, maternity, junior, and plus-size ranges.
Using the Clothing Size Calculator Before Converting
Enter your body measurements in the Clothing Size Calculator to estimate a general XXS–4XL size.
Use that recommendation as an initial reference, then compare your actual measurements with the brand's international chart.
When the general size and international conversion disagree, follow the product-specific physical measurement ranges.
Conclusion
International clothing size conversions are approximate because country labels and brand measurements are not fully standardised.
Convert your body measurements into the chart's unit, compare every relevant dimension, and then read the corresponding local size label.
The Clothing Size Calculator can provide a general starting point before you consult the retailer's chart.
Related Clothing Sizing Guides and Calculators
Main clothing sizing tool
Find Your Recommended Clothing Size
Enter your measurements in the Clothing Size Calculator, then use the related guides below to interpret size charts and compare fit.
Frequently Asked Questions
Are international clothing size conversions exact?
No. They are approximate because brands and countries use different measurement ranges.
What is a US size 8 in the UK?
It is often shown as approximately UK 12, but the brand's physical measurement chart should be checked.
What is a UK size 14 in US sizing?
It is commonly presented as approximately US 10.
What is EU size 40 in US sizing?
It is often approximately US 8, although brand charts vary.
Is medium the same size in every country?
No. International letter sizes are not universal and may cover different measurement ranges.