International size refers to a standardized system used to classify clothing and footwear sizes across different countries. This system helps consumers find the right fit when shopping internationally, as sizes can vary significantly from one region to another. For example, a size 8 in the United States may correspond to a size 40 in Europe. To facilitate global shopping, many brands provide size conversion charts that outline these differences. These charts help customers understand how their local sizes translate to international standards, making it easier to purchase items online or while traveling.