It's 22-3/4 inches with the wheels. That's enough that it won't fit into the cage that they use to measure sizes at the airport. I've had to check this bag at the gate a few times because the counter agent wouldn't let it on the plane. I really don't get it when manufacturers make their bags too big to be accepted by the airlines and they lie about the size in their literature. It's just dumb. I can live without the extra inch. I love the light weight, but I've stopped using this bag for international flights, where they're picky about size. The single towing bar is also awkward when you try to hook a computer bag over it. A normal computer bag will swivel around and fall off, bringing you to an abrupt halt. I switched to the Osprey courier bag because it's designed for a single-bar, but even it slides off the bag occasionally (usually when you're moving fast). Offhand, I can think of many solutions to this problem ranging from a few hooks and rings to well-placed velcro tabs, but it's a big deal when you're moving around the airport fast. That said, the bag's been to Europe dozens of times, and all over the US, and it's holding up well. Its getting a big shabby, but it's been used a lot. The light weight is wonderful, and I love the big wheels when you get off the smooth airport floors onto sidewalks and other accommodating surfaces. It holds a surprising amount of stuff.