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)
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.
50 pounds is the usual weight limit. The largest checked international luggage size allowed is 62 linear (total) inches. Typically, a standard checked luggage size wavers around 27 x 21 x 14 inches. The universally accepted carry-on luggage size for a domestic flights (within the U.S.) is 22 x 14 x 9.
There are three sizes of suitcase: large, medium and cabin. A large case is often suited for a 2 week or longer trip, or a family wishing to pack more and a medium case is better suited for a week away. Cabin size is great for a long weekend or to take on board when you wish to avoid checked baggage fees.