TK and Gap - Set of 2 Men's Long Sleeve Shirts Checkered Pattern TK Size: 3 Feels like a Medium to Large. Gap Size: S Feels like a Medium to Large. I usually wear a Large T-shirt, but both shirts fit perfectly. Both shirts show signs of wear, but there appear to be no noticeable stains or tears. No smokers, no pets. Please purchase if you understand that these are used items. No claims or returns accepted.