If you've ever ordered a Medium in one brand only to find it fits like a Small, you're not alone. Clothing sizes are not standardized across brands or even within the same brand across different product lines.
The root cause is historical. In the 1950s, the US government attempted to create a standardized sizing system, but it was abandoned in 1983. Since then, brands have been free to define their own size standards.
This has led to a phenomenon known as 'vanity sizing,' where brands gradually increase the measurements of each size label to make customers feel good about fitting into a smaller number. A size 8 today has larger measurements than a size 8 from 20 years ago.
Different target demographics also play a role. Brands targeting younger, trend-conscious consumers tend to cut smaller, while brands targeting comfort-oriented shoppers may cut larger.
International differences add another layer of complexity. European, Asian, and American sizing systems use completely different numbering, and even within Europe, sizes can vary between countries.
The best approach? Always check the specific brand's size chart, take your own measurements, and use comparison tools like SizeHub to understand how sizes translate between your favorite brands.