(1). Domestic flights: The total weight of passengers ' hand luggage should not exceed 5 kg, the volume of each piece of baggage does not exceed 20x40x55 cm = 6x12x16.5 inch (depending on the requirements of each airline may vary).
There is a luggage basket at the security checkpoint for passengers to test the size of their hand luggage, and if the passenger's luggage can be placed in the standard basket, the piece of luggage can be carried with you or it will need to be checked in.
(2). International flights: Usually, the total weight of hand luggage should not exceed 7 kg, each piece of baggage volume does not exceed 20x40x55 cm (the sum of the three sides is not more than 115 cm). Passengers travelling on the U.S.-Canada route can only carry one piece of hand luggage with them. (Some airlines have special weight restrictions, please pay attention to the tips on the ticket, or consult the airline.)
1 inch = 3.3333333333333 cm, 1 cm = 0.3 inch