You can even carry empty cardboard boxes as a carry-on, the TSA themselves stated. However, there are two main things you need to know. First, due to airlines' checked luggage policies, you should take the size of your box into account.
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Airlines publish the maximum dimensions allowed for carry-on bags. For example, American Airlines states that a carry-on bag's dimensions cannot exceed 22 by 14 by 9 inches, including handles and wheels. The carry-on must also fit into the sizer at the airport; if it doesn't, you'll be required to check it.
For example, if your bag measures 24 inches long, 18 inches wide, and 20 inches high, its linear inches would be 62 (24+18+20=62). So, when airlines refer to a 62 linear inch limit, they are saying that the combined length, width, and height of your checked luggage cannot exceed 62 inches.
If you are checking in a large or small luggage box:Verify the airline checked baggage restrictions to avoid additional airline fees. Include your name, address, phone number, destination address, and return address inside the box in the event your luggage box gets misplaced.
Typically, a 23kg suitcase size will have the following measurements: Length: 71-81 cm (28-32 inches )Width: 43-51 cm (17-20 inches)Depth: 26-30 cm (10-12 inches)
For example, if your bag is 24 inches tall, 20 inches long and 18 inches wide, its total linear length is 62 inches. Note that using modern spinner bags, which include four wheels on the bottom of your suitcase, means you'll have less space within your actual bag.