Under Armour Men's No Size Tee Shirt Tactical Federal? Tan Made in USA SS055093U

Under Armour Tactical Tee Shirt Men's 40" Chest Size Medium? Features: Tactical fabric 79% cationic polyester/21% elastane an Under Armour classic, feels so sleek Tan/brown shade, probably their Federal tan Made in USA NO SIZE TAG; Measurements are approximately 40" chest and 29" length; WE ESTIMATE THIS IS A MEN'S MEDIUM, based on Under Armour size charts Machine wash warm, tumble dry Condition: Good pre-owned condition, with no rips or stains, but a sprinkling of tiny pulls. Please see pics.