Pendleton Woolen Shirt
Classic Pendleton tartan wool shirt, they are an American heritage company that could kind of be compared to Swandri.
Made in Mexico, from USA Wool woven at the Oregon Pendleton Mills
Size: M on tag, I think this is a womens M as the sleeves are on the shorter side. Measures like a loose-ish womens M (note mannequin is around a men's size M and it does up fine apart from the sleeves).
Armpit to armpit measures 51cm, length is 66cm