KAREN Wool Peacoat Style Jacket

I am not sure of the size but, it measures 16.5 inches shoulder-to-shoulder, the sleeves are 23 inches from shoulder to wrist, the length is 45 inches from shoulder to the bottom. When looking this up, it seems it maybe somewhere near a large or so. I was told originally it was a 10, but not really sure on that. It is 75% Wool, 15% Polyester, and 10% Cashmere. It is pinstriped in black and gray. It is in brand new condition and just beautiful. I would keep it myself but I need a much larger size :)