I know that the common specifications of large iron pots in rural areas are 56cm, 60cm and 66cm in diameter. 56cm is suitable for family daily life, the pot can hold more, and the heat is easy to control. 60cm is suitable for large-capacity cooking, and the pot width is evenly distributed, such as holiday celebrations. 66cm is very suitable for commercial use, with large capacity, and can cook a variety of ingredients at the same time, which is suitable for restaurants and canteens. When choosing a pot, we should consider the demand and use, and pay attention to the quality and durability.