Is 24 Inch Luggage a Carry On
In the good old days, carry on luggage was whatever you could fit in the overhead bin, but now airlines have gotten a bit more particular. Most airlines consider a carry on to be 22 inches or less, so a 24 inch luggage is technically too big, but don't worry, it's not the end of the world. You can still try to sneak it on, but be prepared for some stink-eye from the flight attendants.
The reason airlines are so strict about carry on size is because they want to make sure there's enough room in the overhead bins for everyone's bags. It's like a game of Tetris up there, and if your bag is too big, it's like trying to fit a square peg in a round hole. But don't worry, most airlines will still let you check a 24 inch luggage for free, so it's not the end of the world.