A US Size Chart is a standardized guide that helps individuals determine their clothing sizes based on measurements. It typically includes sizes for men, women, and children, covering various categories such as tops, bottoms, and shoes. Each size corresponds to specific body measurements, making it easier to find the right fit when shopping. The chart usually lists sizes in numerical or alphabetical formats, such as S (small), M (medium), and L (large) for women, or 32 to 40 for men's waist sizes. Understanding the US Size Chart can help reduce the chances of purchasing ill-fitting clothing.