Michihili Pak Choi Cabbage is a type of Chinese cabbage, also known as Chinese celery cabbage or Napa cabbage. It is a large, barrel-shaped vegetable that can grow up to 16 inches tall and 10 inches wide, with tightly packed leaves that are pale green with white veins. The leaves are crisp and tender, with a mild and slightly sweet flavor that is often used in Asian cuisine.