There is no single European carry-on size. The idea of one continental standard is the most persistent myth in European travel, and packing to it is how people end up paying at the gate.
We checked fifteen European carriers against their own published policies. The dimensions cluster loosely. The weight limits do not.
What each European carry-on size limit actually is
Every figure below came off the airline’s own baggage page, not a comparison site.
| Airline | Cabin bag (cm) | Weight limit |
|---|---|---|
| British Airways | 56 x 45 x 25 | None published |
| Iberia | 56 x 40 x 25 | 10 kg |
| TAP Air Portugal | 55 x 40 x 25 | 10 kg |
| Air France | 55 x 35 x 25 | 12 kg combined |
| KLM | 55 x 35 x 25 | 12 kg combined |
| Aer Lingus | 55 x 40 x 24 | 10 kg |
| Lufthansa | 55 x 40 x 23 | 8 kg |
| SWISS | 55 x 40 x 23 | 8 kg |
| Austrian | 55 x 40 x 23 | None published |
| SAS | 55 x 40 x 23 | 8 kg |
| Turkish | 55 x 40 x 23 | 8 kg |
| LOT Polish | 55 x 40 x 23 | 8 kg |
| Finnair | 55 x 40 x 23 | 8 kg combined |
| Norwegian | 55 x 40 x 23 | 10 kg combined |
| Icelandair | 55 x 40 x 20 | 10 kg |
Length is the easy part
Almost everyone lands on 55 cm long. British Airways and Iberia allow 56, which is a rounding difference rather than a real one.
If your bag is 55 cm or under along its longest side, length will rarely be the thing that stops you.
The other two dimensions are where it gets interesting.
Depth is the trap
Depth runs from 20 cm to 25 cm across this list. That is a 25 percent difference on the dimension most bags are thickest in.
Icelandair sits at the bottom with 20 cm. British Airways, Iberia, TAP, Air France and KLM all allow 25.
A bag built for a 25 cm allowance will not go into a 20 cm sizer. It is the most common way a European carry-on size assumption fails.
Pack to 20 cm if Icelandair is anywhere in your itinerary. Our size checker will tell you which carriers your bag clears.
Weight is where the real difference lives
North American travelers underestimate this part most. US carriers largely do not weigh cabin bags. European ones do.
The published limits run from 8 kg to 12 kg, and two carriers publish none at all.
Worse, some of those numbers are not what they look like. Air France, KLM, Finnair and Norwegian cap the cabin bag and personal item together.
So Finnair’s 8 kg is not 8 kg for your roller. It is 8 kg for the roller plus the laptop bag on your shoulder.
The combined weight rule, explained
Most comparison guides list these as per bag limits. They are not, and the difference is material.
On Lufthansa, 8 kg applies to the cabin bag alone. Your personal item is extra.
On Finnair, the same 8 kg has to cover both. In practice that is a much tighter allowance for the same headline number.
Check which kind of limit applies before you weigh anything. Each airline guide states it.
How to pack for a European trip
Pick the strictest carrier on your itinerary and pack to that. Connections mean the tightest rule usually governs the whole journey.
For a bag that works almost everywhere in Europe, aim for 55 x 40 x 20 cm and 8 kg. That clears every carrier in the table above.
Weigh it at home with everything in it. Include the personal item if your carrier combines them. Airport scales are where optimism goes to die.
Then check what you are putting inside it, since the cabin rules and item restrictions apply on top of size.
The bottom line
The European carry-on size that actually works is 55 x 40 x 20 cm at 8 kg. Anything larger is a bet on which airline you end up with.
Dimensions vary less than people fear. Weight varies more, and the combined limits are the trap nobody flags.
Flying to the US as well? Cabin sizes there run larger and are rarely weighed, which is why a bag bought in America often fails in Europe.