XS is a term used to describe something that is extra small in size. It is commonly used in apparel and clothing to denote the smallest size available. Some synonyms for XS that can be used in place of this term include petite, tiny, minuscule, pint-sized, and pocket-sized. Additionally, other synonyms like itsy-bitsy, weeny, and wee can also be used depending on the context in which XS is being used. In addition to clothing, XS can also be used to describe things like technology and accessories that are compact and small in size. Synonyms for XS play an important role in making language more interesting and varied.