Check by bag size
Nine common cabin-bag and carry-on dimensions, each with a manually written explanation and a breakdown across our reviewed airline guides.
Each size page takes one bag dimension and checks it against every reviewed airline, showing where it fits free, where it is tight, and where it is over the limit — with the exact margin in centimetres and inches. Sizes are compared the way an airline sizer works: the three outside edges after rotation, so the orientation of the bag does not change the result.
Checking by bag size — FAQ
How should I measure my own bag?+
Measure height, width and depth at the widest points, including wheels, handles and any bulging pockets, then open the size closest to yours. Airlines measure the packed bag as it arrives at the gate, not the flat "sleeve" size on the label.
Why does the orientation of the bag not matter?+
Airlines use a sizer box, so we sort your bag’s three sides and the limit’s three sides from largest to smallest and compare like with like. A bag that is 55 × 40 × 20 cm is treated the same whichever way you turn it.
What does a "tight" result mean?+
A bag with less than 0.5 cm of clearance on any side is marked tight rather than a clean fit, because real-world measuring and packing can easily push it over the line. Treat tight as "probably fine, but no margin for a full pack".
I am not sure which size to buy — where do I start?+
Use the Best size guides. They work out the single largest bag that fits a whole group of airlines for free, so you can buy once and clear the group instead of guessing.