Why the Same Size Fits Differently in Every Country
31 July 2026
Why the Same Size Fits Differently in Every Country
You ordered your usual size from a foreign shop, and it did not fit. This is not a mistake in your order or a defective item; it is a direct consequence of how clothing sizes are defined and how they have evolved differently in each country. There is no single international standard for clothing sizes, and the numbers on the label are often more about marketing than about your body.
When you compare size charts from the EU, UK, US, Turkey, and Asian countries, you will find that the same label size corresponds to different body measurements. For example, a size 38 in the EU typically corresponds to a UK size 10 and a US size 6, but the actual measurements can vary by several centimeters between brands and even within the same brand. The same body measurements—bust, waist, and hips—may be labeled as a size 8 in the US, a size 12 in the UK, and a size 40 in the EU. This is not a coincidence; it is the result of different historical sizing systems that were never harmonized.
The lack of an international standard is not for lack of trying. The European standard EN 13402 was developed to create a common system for labeling clothing sizes. It defines a set of body measurements—bust, waist, hips, and height—and provides a method for determining the size based on these measurements. However, EN 13402 is a voluntary standard, and it does not specify a single size designation for each set of measurements. Instead, it offers a range of options, and manufacturers are free to choose how to label their garments. As a result, even within Europe, a size 38 from one brand may not match a size 38 from another, because the standard does not mandate a fixed correspondence.
Vanity sizing is another reason why sizes drift. In many countries, especially the US, manufacturers have gradually shifted their size charts so that a smaller number can be used for the same body measurements. This trend, which began decades ago, is driven by the desire to make customers feel better about their size. A woman who wore a size 12 in the 1980s might now wear a size 8, even though her body measurements have not changed. This practice is not regulated, and it varies by brand and market segment. In contrast, some European and Asian brands have been more conservative, but they are not immune to the pressure to adjust sizes to meet customer expectations.
Given this confusion, which measurement should you trust when the label and the chart disagree? The answer is simple: trust the actual measurements of the garment, not the size number. A size label is only a rough guide, and the size chart provided by the brand is a better reference, but even that can be misleading if the chart is based on a different body shape or if the brand uses vanity sizing. The most reliable approach is to measure a similar garment that fits you well and compare it to the brand's size chart. If the chart provides garment measurements, use those. If it only provides body measurements, add some ease to account for the fit you prefer.
To survive brand differences, you need a conversion approach that is flexible. First, know your own body measurements (bust, waist, hips, and inseam) and your preferred fit (tight, regular, or loose). Second, when shopping from a foreign brand, always check its size chart and compare your measurements to the ones listed. Do not rely on the size number alone. Third, read customer reviews for insights on how the item fits—whether it runs small or large. Finally, be prepared to try different sizes, and if you are buying online, check the return policy. With this approach, you can reduce the risk of disappointment, but you cannot eliminate it entirely, because sizing will always vary.
In the end, the size on the label is a starting point, not a guarantee. To find clothes that fit, you have to measure yourself, compare with the brand's chart, and be ready to adapt. The next time you order from abroad, remember that the size is not a universal truth, but a suggestion. Your body is the only real reference.
Every piece in the catalogue is listed with its own measurements — see Outerwear and Jumpsuits.