Lui Hua: World's Largest Hand --his left thumb is 10.2 inches long: Chinese man Lui Hua suffers from a rare condition known as macrodactyly. When he was hospitalized in Shanghai on July 2007, his left thumb measured 10.2 inches and his index finger measured close to 12. On July 20 surgeons undertook a seven-hour operation to reduce the size of Liu's fingers and thumb. Doctors removed 11 pounds of flesh and bone in the procedure. A second surgery is scheduled to take place.