This is a Ralph Lauren short-sleeved knit. The color is a calm and beautiful blend of light blue and gray. The color in the photo measuring the sleeve length (photo 6) is the closest representation. The size is L, but it should also fit someone who usually wears M. I usually wear a size M. It has been worn only a few times and is still in good condition. I'm selling it because I don't have many opportunities to wear it. Please consider purchasing only if you understand that this is a used item.