What size box is suitable for traveling and shopping abroad?

1. "18 inch": it can take the size of an airplane and is suitable for1person to travel for about 2-3 days. 2. "20-inch": the size of a plane, suitable for 1 person to travel for about 5 days, for business or short-distance travel. Generally, the sum of the length, width and height of a 20-inch suitcase should not be greater than 1 15cm, and such a boarding box can be brought into the aircraft cabin. The most common size design of a 20-inch suitcase is 30×20×55 cm long. This suitcase looks small and exquisite, which is the first choice for many young consumers and business people. Because they don't usually carry a lot of luggage, they are simple daily necessities, so it is perfect for them to use this size suitcase. 3. "22 inch": it must be checked, suitable for 1 person to travel for about 5-7 days, which is not much different from 20 inch. 4. "24 inch": it must be checked, suitable for two people to travel for about 7- 10 days, and for domestic tourism. Generally, the sum of the three lengths of a 24-inch suitcase shall not be greater than 135cm, which is the standard boarding suitcase size stipulated by the aircraft. The most common size design of 24-inch suitcase is 38× 28× 60cm in length, which is the most used suitcase. It has a moderate volume and can hold a proper amount of articles, neither more nor less. The 24-inch suitcase is the most common suitcase and the most suitable suitcase for the public. If you are a college student or a white-collar worker, I believe this suitcase can meet your travel requirements. 5. "26 inch": it must be checked, suitable for two people to travel 10- 15 days, and shopping is not allowed when traveling abroad.