What if my carry-on is 2 cm over the size limit?
A carry-on bag that is 2 cm (about 3/4 inch) over the limit often goes unnoticed, especially on full-service airlines. But if staff ask you to put it in the sizer and it doesn't fit, they can make you check it — at the gate, low-cost airlines usually charge a fee that's higher than paying for a bag in advance. The safest move is to make the bag fit before you get to the airport.
How strict airlines are
- Full-service airlines usually check bag size only when a bag is obviously too big or the flight is full.
- Low-cost carriers in Europe, Asia and the US often check at the gate and charge for bags that don't fit the sizer. Small cabin-bag sizes for these airlines are common.
- Size includes wheels and handles. A bag listed as 55 cm may measure 57 cm with its wheels.
What to do before you fly
- Measure the bag with wheels and handles, and compare it with your airline's exact limit.
- Unzip the expansion zipper if the bag has one, and repack so nothing bulges.
- Move items to your personal item or wear heavier clothes and a jacket.
- Use a soft bag if possible; soft bags squeeze into sizers more easily than hard ones.
- Add a checked bag online if you're unsure. It's usually cheaper in advance than at the gate.
If you are stopped at the gate
Stay calm, try compressing the bag into the sizer, and if it still doesn't fit, ask about the options. You may be able to check it for a fee, and some airlines check it for free when the overhead bins are full. Take out medicine, valuables, electronics with lithium batteries and documents before handing it over.
FAQ
What does 55 × 40 × 20 cm mean?
The maximum height, width and depth of a carry-on bag, including wheels and handles.
What happens if my carry-on is overweight?
On airlines with weight limits, often 7–10 kg in Europe and Asia, an overweight bag may have to be checked for a fee. Many US airlines don't weigh carry-ons.
Can I take a slightly larger bag on board?
Sometimes, but it's at the staff's discretion, and low-cost airlines are least flexible.
What happens if my bag doesn't fit in the sizer?
You'll usually have to check it at the gate, often for a fee, and collect it at baggage claim.