Selling Ralph Lauren coat, model RN 51711. This was purchased at a department store (Macy's, Bloomingdale's, etc.), and not direct from Ralph Lauren.
The size is 38R but it fits loose, almost as if this is an overcoat. Overcoats are typically worn on top of a suit jacket or blazer, and its length should cover the knees.
On the inside, there are two chest pockets. There is also a glove pocket on the inside, left side.