Ralph Lauren Men’s Vintage Button Down Embroidered Skiers Gray Size 12

Ralph Lauren vintage button down size 12. 90% rayon and 10% wool. All gray with embroidered skiers and skis going down the placket. Soft and comfortable and in excellent condition. Measurements: length- 27 inches and Chest( underarm to underarm)- 21 inches. I’ve never seen men’s shirts sized like that but it is vintage. The measurements seem like a medium to me.