The size is marked as M, but I think it's a bit larger than a Japanese L size. There is no Polo mark. The color is closest to the actual item in the 2nd and 3rd photos. The following is an automatically generated description from Mercari: Navy patterned long-sleeved shirt. - Color: Navy - Design: Patterned - Sleeve Length: Long Sleeve - Buttons: Button-down front - Back Design: Patterned Thank you for viewing.