This is a Stephen Alan knit. Of course, it is authentic. The color is gray beige, and the material is 83% cotton and 17% acrylic. The size is XL, and the flat measurements are: length/approx. 76cm, width/approx. 65cm, shoulder width/approx. 64cm, sleeve length/approx. 57cm. As it is a knit, it has elasticity. It has been used, but you can still wear it. This is a highly recommended item for those who fit the size. Notes Due to work, email replies may be delayed. Please understand. There are some minor stains and pills. Please understand that there may be minor scratches or stains that may occur during storage. Comments If you have any questions, please feel free to contact us.