"Extra Small" is a size designation commonly used in clothing and other products to indicate a smaller fit. It typically refers to items that are designed for individuals with smaller body measurements, often corresponding to a specific range of chest, waist, and hip sizes. This size is often labeled as "XS" in clothing tags. In various industries, "Extra Small" can also apply to other items, such as electronics or pet products. For example, pet collars may come in an "Extra Small" size to fit smaller dog breeds, ensuring comfort and safety for the animal.