Charles Klein Dress Pea Coat with rabbit fur hood

Charles Klein Wool Dress Pea Coat with Genuine Rabbit fur hood. Excellent condition. Classic and Classy! Size is marked 1P. I think that translates to a 1XL. Model in the coat wears a Medium and is 5'3" - it is much too big on her. At the length it falls, I wouldn't think it's a petite, so maybe the P is for plus? I couldn't find any definitive sizing information for this brand. Warm and beautiful, with a vintage Hollywood feel.