How big is the suitcase for two people to travel?

Two people travel with a 20-inch suitcase, which can be taken on the plane, so it is recommended to take a 20-inch suitcase, which is convenient to carry and can be taken on the plane.

Early suitcases were made of wood or other heavy materials. With the popularity of air travel, the material of luggage tends to be lighter hard plastic or cloth. Most models are also equipped with a built-in small version of the wheel, which can be easily pulled with a pull rod.

Extended data:

The size of suitcases in the market is generally based on the size regulations of the carry-on boarding box (hand luggage) and consignment box (checked luggage) of the International Air Transport Association. For example, Cathay Pacific stipulates that the maximum size of each checked baggage must be less than 158cm [2] and the maximum size of each hand baggage must be less than 56x36x23 [3].

After the "9 1 1" incident, the airport security inspection became stricter, and the lock of the suitcase was gradually changed to the standard lock formulated by the Transportation Security Bureau of the US Department of Homeland Security.

In the United States and Canada, customs can use the key of a standard lock to open this baggage for inspection, so it is no longer necessary to destroy the baggage.

References:

Baidu encyclopedia-suitcase