Tag says as 10, but check measurements since it is vintage, it may fit smaller. Likely from 1980's or 1990's. Measures about 13 1/2 inches across the chest 12 inches across the waist and about 31 1/2 inches long. No stretch. Has a belt loop strap on one side but no belt came with it when I got it. May need a slip as it is somewhat see through. See last photo with black hanger for example of seeing through it. Sorry that my lighting is not very good.