KLM is the airline with the odd-shaped cabin bag. While most of Europe standardised on 55 x 40 x 23 cm, KLM and its partner Air France kept 55 x 35 x 25 cm: narrower, deeper, and with a weight limit that is the most generous of any legacy carrier in Europe at 12 kg. That combination confuses people in both directions. Owners of a standard 55 x 40 case worry that it is 5 cm too wide; owners of a heavy case are surprised how much they can bring. This is the 2026 version of our KLM carry-on guide: the numbers, the fares, what the shape means for a hard case, what actually happens at Schiphol, and which Peli cabin cases fit. ✈️
We sell Peli cases and we will be specific about which ones fit KLM's frame; the rules are KLM's, current as we write, and the airline changes them without much notice, so confirm on klm.com before you fly. Air France uses the same allowance, and our Air France carry-on guide mirrors this one. For the other big European carrier, see Lufthansa carry-on baggage 2026.
The 10 things to know
1. The cabin bag: 55 x 35 x 25 cm 📏
One piece of hand baggage per passenger in Economy, with maximum dimensions of 55 x 35 x 25 cm including wheels, handles and pockets. The unusual numbers are the point: KLM's frame is 5 cm narrower and 2 cm deeper than the 55 x 40 x 23 cm frame used by Lufthansa, LOT, SAS and most others. A bag built to the common European standard is within KLM's height and depth and 5 cm over its width on paper. We come back to what that means in practice at point 6.
2. The accessory: 40 x 30 x 15 cm 👜
In addition to the cabin bag, every passenger may bring one accessory of up to 40 x 30 x 15 cm: a handbag, a laptop bag, a small backpack, a camera bag. It goes under the seat in front. KLM's accessory allowance is deeper than Lufthansa's 10 cm, which makes a real difference for a camera bag or a laptop sleeve with a charger. Unlike at Lufthansa, though, the accessory is counted in the weight limit, which brings us to the number that matters.
Cabin cases that fit KLM's frame
3. The 12 kg limit is combined, and it is generous ⚖️
In Economy, the cabin bag and the accessory together may weigh up to 12 kg. Not 12 kg each: 12 kg for both. That is still the most generous cabin weight of any major European legacy carrier, four kilograms more than Lufthansa, and it changes the calculation for hard cases. A Peli 1510 at roughly 5.4 kg with its foam leaves 6.6 kg for contents and accessory on KLM, where on an 8 kg airline it leaves 2.6. The Air 1535 at 3.95 kg leaves 8 kg. For a photographer or a drone pilot, KLM's 12 kg is the difference between checking equipment and carrying it. KLM weighs at check-in desks and, on full flights, at the gate; a combined figure over 12 kg means the cabin bag goes to the hold.
4. Light, Standard and Flex: the cabin bag is the same on all of them 🎫
KLM sells European Economy in Light, Standard and Flex fares, and long-haul Economy in a similar ladder. The cabin bag and the accessory are included on every one of them, including Light. Light removes the checked bag, seat selection and refundability; it does not touch the hand baggage. This is the same logic as Lufthansa and the opposite of Ryanair, Wizz Air and Transavia, KLM's own low-cost sister, where the cheapest fare includes only the small bag. If you travel with one case and a laptop bag, Light is the fare; if you need the hold, Standard is cheaper than adding a bag afterwards.
5. Business Class: two bags, 18 kg total 💼
Business Class passengers may bring two pieces of hand baggage of up to 55 x 35 x 25 cm each plus the accessory, with a combined weight of 18 kg for all three. As in Economy the figure is a total, not per piece. Two 8 kg cases and a 2 kg laptop bag fit; two 9 kg cases do not. Flying Blue elite status does not add cabin pieces in Economy; the second bag is a class benefit.
Make the 12 kg count: organisers for the 1510 and Air 1535
6. What the shape means for a hard case 🧱
Here is the honest part. KLM's frame is 35 cm wide. A standard 55 x 40 x 23 cm suitcase is 40 cm wide, and a hard one cannot be squeezed. At Schiphol and on most KLM outstations, a 55 x 40 case is accepted day to day, because the practical limit KLM enforces hardest is weight and the gate sizers are used mainly when a flight is full; but it is 5 cm over on paper, and a strict agent on a full flight is within the rules to send it to the hold.
This is where Peli's cabin cases are unusually well placed. The Peli Air 1535 is 55.8 x 35.5 x 22.8 cm, the Peli 1510 is about 55.9 x 35.1 x 22.9 cm and the ATX HC22 is 55.9 x 35.6 x 23.1 cm: all of them are built on a 35 to 36 cm width because they were designed to the older international carry-on standard, not to the 40 cm European one. That makes them a near-exact match for KLM's frame on width and comfortably inside it on depth. The half-centimetre on the 1535 and HC22 is within the tolerance of every sizer we have seen, and none of the three has ever been refused at Schiphol to our knowledge. If you fly KLM and Air France regularly, a Peli cabin case is one of the few hard cases that is genuinely the right shape.
7. Full flights and gate-checking 🛄
KLM's short-haul fleet of Boeing 737s and Embraers fills its bins fast, and on full flights gate agents ask for volunteers to have cabin bags loaded into the hold free of charge; if there are not enough, bags are assigned, usually from the last boarding zones. The bag returns on the belt at your destination. The consequences are the ones we give for every carrier: nothing valuable, fragile or battery-powered in a cabin bag that could be gate-checked, which is what the accessory is for, and a hard case with latches survives a surprise trip through the hold in a way a soft bag does not. What the hold does to a bag is in what really happens to your suitcase after check-in. Embraer regional jets are the sharp end: their bins take a 55 x 35 case on its side only, and gate-checking is routine.
8. Liquids, electronics and batteries 🔋
Security rules at Schiphol are the standard European ones, with one useful difference: Schiphol has installed CT scanners in most lanes, so liquids and laptops can often stay in the bag and the 100 ml rule is relaxed at Amsterdam, though not at the airport you fly back from. How liquid limits work at different airports keeps track. Power banks and spare lithium batteries must be in the cabin, never in the hold, and must come out of a bag before it is gate-checked; the thresholds are in our power bank guide. KLM's prohibited-items list follows the European standard, covered in prohibited items in hand baggage.
9. Exceeding the limits: what it costs 💶
A cabin bag that is over size or over weight at the gate goes into the hold as an additional checked bag at the airport rate, which on a Light fare with no hold bag included is the most expensive way to buy one. KLM publishes its baggage fees by route and they change; the rule that does not change is that a bag added at booking costs less than at check-in, which costs less than at the gate. How to avoid baggage fees compares carriers.
10. KLM, Air France and Transavia are three different policies ✈️
KLM and Air France share the 55 x 35 x 25 cm, 12 kg allowance and the 40 x 30 x 15 cm accessory, so an itinerary that mixes the two has one set of rules. Transavia, the group's low-cost carrier, does not: its base fare includes only a small under-seat bag, and the cabin bag is a paid add-on, the way it is on Ryanair. If your KLM booking has a Transavia-operated leg, check that segment separately; a case that flies free on the KLM leg may be paid on the Transavia one. And if you are comparing KLM with the alternatives on your route, the table below lines them up.
KLM carry-on rules at a glance
| Fare or class | Cabin bags | Max size each | Accessory | Combined weight |
|---|---|---|---|---|
| Economy Light | 1 | 55 x 35 x 25 cm | 40 x 30 x 15 cm | 12 kg |
| Economy Standard / Flex | 1 | 55 x 35 x 25 cm | 40 x 30 x 15 cm | 12 kg |
| Premium Comfort (long-haul) | 1 | 55 x 35 x 25 cm | 40 x 30 x 15 cm | 12 kg |
| Business | 2 | 55 x 35 x 25 cm | 40 x 30 x 15 cm | 18 kg |
Rules as published by KLM at the time of writing in 2026; klm.com is the final word for your flight.
If you booked Standard: checked cases for the hold
How to use 12 kg well
- Weigh the case and the accessory together. KLM's limit is combined; a 4 kg laptop bag counts.
- Put the camera or the drone in the cabin case and the clothes in the hold if you have one; on KLM the kilograms are there for the equipment.
- Use the 15 cm accessory depth. A camera bag or a laptop sleeve with charger fits where Lufthansa's 10 cm would not.
- Batteries and valuables in the accessory, so that a gate-check on a full 737 costs you nothing.
- Liquids within 100 ml unless you are certain the departure airport has CT lanes; Schiphol usually does, your return airport may not.
- Case on its side for the Embraer. Regional jet bins take 55 x 35 lying down, not standing.
- Weigh it at home. A luggage scale is cheaper than one airport-rate bag.
KLM against the others
| Airline | Cabin bag in the base fare | Size | Weight |
|---|---|---|---|
| KLM / Air France | Yes, on every fare | 55 x 35 x 25 cm | 12 kg combined |
| Transavia | No, paid | 55 x 35 x 25 cm | 10 kg |
| Lufthansa | Yes | 55 x 40 x 23 cm | 8 kg |
| Ryanair | No, with Priority only | 55 x 40 x 20 cm | 10 kg |
| Wizz Air | No, with Priority only | 55 x 40 x 23 cm | 10 kg |
| British Airways | Yes | 56 x 45 x 25 cm | 23 kg |
The pattern: KLM gives you an unusual shape and a generous weight. Lufthansa gives you the common shape and takes it back in kilograms. The low-cost carriers give you kilograms and charge for the bag. Which suits you depends on whether your problem is width, weight or money.
Frequently asked questions
What size hand luggage does KLM allow in 2026?
One cabin bag of up to 55 x 35 x 25 cm plus one accessory of up to 40 x 30 x 15 cm, together weighing up to 12 kg in Economy. Business allows two cabin bags plus the accessory, 18 kg combined.
Does KLM Economy Light include hand luggage?
Yes. Light removes the checked bag and flexibility; the cabin bag and accessory are the same on every fare.
Will a 55 x 40 x 23 suitcase be accepted on KLM?
On paper it is 5 cm too wide. In practice it is usually accepted, but on a full flight a hard case of that width can be sent to the hold. A case built to 55 x 35 is the safe choice.
Which Peli case fits KLM's 55 x 35 x 25?
The Air 1535, the 1510 and the ATX HC22 are all 35 to 36 cm wide and around 23 cm deep, which matches KLM's frame more closely than a standard European cabin case.
Is the 12 kg limit per bag or combined?
Combined. The cabin bag and the accessory together may weigh 12 kg in Economy; in Business, two cabin bags and the accessory together may weigh 18 kg.
Are the rules the same on Air France and Transavia?
Air France, yes: the same dimensions, accessory and 12 kg. Transavia, no: the cabin bag is a paid add-on on its base fare.
The short version
KLM gives you 55 x 35 x 25 cm and 12 kg combined with a 40 x 30 x 15 cm accessory on every fare, 18 kg and two bags in Business, and enforces the weight more than the width. A standard 55 x 40 case is over on paper; a Peli cabin case at 35 to 36 cm wide is the right shape. Weigh the case and the accessory together, keep batteries and valuables in the accessory, lay the case on its side for the Embraer, and Schiphol is one of the easier airports in Europe to fly hand-luggage-only from. 🌍
