Asian sizes generally run smaller than Western sizes, particularly for clothing. This means that if you are used to wearing a certain size in the United States or Europe, you may need to choose a larger size when shopping for clothing in Asian countries. For example, a medium-sized shirt in the United States may be equivalent to a large or extra-large size in Asia.
It's important to note that there is some variation in sizing standards across different Asian countries, so it's always a good idea to check the specific size chart for the brand or store you're shopping from. Additionally, some brands may offer both Asian and Western sizing options, so it's important to double-check which sizing standard is being used before making a purchase.