The size of the carry-on luggage allowed on a plane varies depending on the airline and aircraft type. Generally, for domestic flights in China, the size of the carry-on luggage should not exceed 55cm×40cm×20cm, and the weight should not exceed 5 kilograms. However, the specific size and weight limits may vary depending on the airline and aircraft type. It is recommended to check the relevant regulations of the airline before departure to avoid unnecessary troubles caused by oversized or overweight luggage.
