What Size Bag Is Considered a Carry-On? Airline Standards & OEM Guide

If there’s one question travelers and luggage brands both struggle with, it’s this: what size bag really counts as a carry-on? You’d think it’s the same worldwide — but it’s not. Each airline has its own version of “carry-on approved,” leading to confusion for passengers and manufacturers alike.
How Big Can a Carry-On Bag Be? What Are the Rules, Which Sizes Work & How to Design Them Right

If you’ve ever tried boarding a flight with a slightly overstuffed bag, you know the anxiety that sets in when the gate agent gives it that calculating look. Suddenly, your “carry-on” might not make the cut — and you’re left gate-checking it with a mix of regret and frustration. So, how big can a carry-on bag really be, and why does it matter so much?
What Size Is a Carry-On Bag? Everything You Need to Know Before Flying

When you’re rushing through the airport, juggling your boarding pass, and trying to squeeze your suitcase into the overhead bin, one question might suddenly feel more important than anything else: what size is a carry-on bag, really?