Authentic. Purchased at a department store in Tokyo. Size S. Year of purchase unknown. Length 54cm, shoulder width 42cm, sleeve length 61cm, bust 44cm. The sleeves are slightly long. The cuffs and hem have 7cm of blue tweed fabric. I think it would be cute paired with a dress or skirt, a little more dressy than a stiff denim look. There are no stains or spots, but there is some slight fuzzing on the tweed fabric. This is a used item, so please refrain from purchasing if you are sensitive to such things.