The sweater is authentic. It is made of 98% cashmere and 3% Nylon. It is a size M. It has a round neckline. It is in excellent condition. There are no snags, over use, or tears of any kind. The size label was taken off, but the designer label is still on. It is unisex. The dimensions are: Chest or pit to pit : 20.5"s Sleeve length, shoulder to cuff: 30's Neck to hem: 29"s Waist: 20"s