Carry-on approved will meet most airline Requirements for luggage allowed onto an airplane ; small enough to FIT under the seat or in the Overhead bin. Standard size is 56 cm long, 35 cm wide and 24 cm deep. (In other non-metric systems: 22 x 14 x 9 inches)
Other definition:
Carry-on approved is the Will meet most airline requirements for luggage allowed onto an airplane; small enough to FIT under the seat or in the overhead bin. Standard size is 22 x 14 x 9"