Clothing size refers to the standardized measurements used to determine the fit of garments for individuals. Sizes can vary by brand and region, often categorized into labels such as small, medium, large, and numerical sizes like 2, 4, or 10. These sizes are based on body measurements, including bust, waist, and hip circumference. Different countries may have their own sizing systems, such as US, UK, and EU sizes, which can lead to confusion when shopping internationally. Additionally, some brands offer plus sizes or petite sizes to accommodate a wider range of body types, ensuring a better fit for more people.