What is "extra small"?

Extra small or XS is a clothing size that refers to a very small size, typically the smallest size available in a range of standard sizes. It usually corresponds to a chest measurement of 30-32 inches and a waist measurement of 23-24 inches. XS size clothing is generally designed to fit a slim and petite body type, with a shorter length and narrower width. This size is commonly found in women's clothing, but it can also be used for children's and men's clothing.