This well-marbled cut consists of two lean, tender steaks – the strip and tenderloin – connected by a telltale T-shaped bone. In a T-Bone, the tenderloin is between 1/2 and 1 1/4 inches in diameter.
The T-bone and porterhouse are steaks of beef cut from the short loin. Both steaks include a “T-shaped” bone with meat on each side. However steaks with a large tenderloin are often called a “T-bone” in restaurants and steakhouses despite technically being porterhouse.