XXS, or "extra extra small," is a clothing size that is smaller than the standard small size. It is often used in fashion to cater to individuals who require a more fitted garment. XXS is commonly found in women's clothing, including tops, dresses, and pants, and is designed to provide a snug fit for those with smaller body measurements. The XXS size is part of a broader sizing system that includes various other sizes, such as XS (extra small), S (small), and M (medium). Different brands may have slightly different size charts, so it's essential for shoppers to check specific measurements when selecting clothing in this size range.