40x30x15 Hand Luggage: The Best Underseat Bags for the 2026 Standard

A lot of the confusion starts with vocabulary. Airlines use different words for the same object, and retailers invent a few more on top.

Personal item. The small piece that goes under the seat in front of you. Handbag, laptop bag, flat backpack. This is where 40x30x15 cm lives. Free on almost every fare, including the cheapest one.

Hand luggage proper. The cabin trolley for the overhead bin, usually 55x40x23 cm. On basic and light fares it costs extra, and often more than the fare itself hurt.

Small bag. Lufthansa's own word for its personal item. Ryanair says "small personal bag" and means its own, larger figure. Same phrase, different number. That's where it goes wrong for most travellers.

Underseat bag. Not an airline term at all. It's shop language, and it appears in no carrier's conditions of carriage. Search for it and you land on product pages instead of rules.

Then there's the gate sizer, which beats all of it. What the frame says goes. What the label on your backpack says is just a claim.

We went through the baggage pages of eleven airlines for this overview. Research date: 27 August 2026. Nothing here was measured by us; these are the airlines' own published figures.

Nine of eleven land on the same number. KLM, British Airways, Air France, Iberia and Lufthansa all cap the free personal item at 40x30x15 cm. The clearest of the lot is Pegasus Airlines: 40x30x15 cm, 3 kg maximum, and included even on its cheapest Light fare.

The full, continuously updated airline baggage size database lists every airline we track, with sources and a per-row research date.

Condor is the newcomer here. Until the end of April 2026 its depth limit was 10 cm; since Condor's new baggage rules from 1 May 2026 (German-language coverage) it's 15 cm. So if you're reading an older guide that lists Condor at 40x30x10 cm, that guide is simply out of date.

We're leaving Eurowings out on purpose

Eurowings isn't in the table, and that's deliberate. The figures in circulation contradict each other. Some sources say 40x30x25 cm for its "small bag", others say 40x30x10 cm for a separately named personal object. Eurowings' own pages wouldn't load during our research on 27 August 2026, so we can't confirm a number.

Honestly, this is exactly how the wrong tables get made. One site copies another, nobody checks, and three years later there's a measurement online that was never true. If you're flying Eurowings, I'd just check your own booking confirmation. Two minutes, and it's the only source that counts at the gate.

Same number, different enforcement

Nordic carriers have a reputation in travel forums for being the strictest on the personal item, with SAS leading that list. With the big cabin trolley, plenty of airlines look the other way, because the overhead bin is rarely full to the last centimetre. Under the seat in front of you, though, the space is physically fixed. And fixed space gets measured.

That's not a reason to panic. It is a reason not to buy right at the limit. A bag labelled exactly 40x30x15 cm tends to run a few millimetres thicker once it's packed, because fabric gives and seams add bulk. A model that sits slightly under spec forgives that.

No. But the answer is better than you'd expect.

Ryanair's own bag policy puts the free small bag at 40x30x20 cm, in force since September 2025 and 40x25x20 cm before that. Wizz Air allows the same figure with a 10 kg weight cap on top.

Now the arithmetic almost nobody writes down:

• Width: 40 ≤ 40

• Height: 30 ≤ 30

• Depth: 15 ≤ 20

All three axes clear. A bag built to a genuine 40x30x15 cm is automatically allowed on Ryanair and Wizz Air; it just isn't using the full allowance. The reverse doesn't work. A 40x30x20 backpack is five centimetres too deep for KLM or Lufthansa.

So if you fly both budget and full-service carriers, buying to the stricter number is the sane move. Our German-language piece on the EU hand luggage standard 2026 covers how much space you give up on Ryanair by doing that, and when the bigger bag still makes sense.

The "expandable to 40x30x20" trap

There's a whole product category built to sell exactly this compromise: backpacks at 40x30x15 cm with a zip that opens them out to 40x30x20 cm. Clever, in theory. It works as long as the zip stays shut.

It rarely does. Once someone has expanded to 20 cm, they don't repack down to 15 cm for the flight home, and that's the flight with the stricter airline. Travellers on the Rick Steves travel forum describe this exact problem: models marketed by name for British Airways, KLM and Air France only meet the limit zipped closed.

Which makes our filter for the picks below a simple one. Only bags whose own product listing states a fixed 40x30x15 cm. No "expandable to", no "up to". The dimensions below come from each product listing's manufacturer specification, not from measurements of our own.

Part of the buzz around this number comes out of Brussels. The European Parliament's TRAN committee adopted its report on 25 June 2025, and the plenary then voted 632 to 15 in favour of writing a free personal item of exactly 40x30x15 cm into EU law, alongside a second free cabin piece of up to 100 cm total dimensions and 7 kg.

It isn't law, though. The Council rejected Parliament's position and a conciliation committee is still negotiating. The EU baggage rules tracker at Passengers Friend reckons that even with an agreement, application is 12 to 24 months away.

What that means for you is straightforward. Until then, only what your airline publishes on its own page applies. The upside is that nine of the eleven airlines we checked already use the future EU figure. Buying a 40x30x15 bag today isn't a bet on legislation.

Before you buy something new, it's worth checking what you already own. Most travel backpacks don't carry an accurate dimension label at all, or the one they carry is close but not exact.

Step 1: Measure empty, not packed. Lay the backpack flat and measure all three axes empty, with a tape measure rather than a rigid ruler: width (the long side), height (standing on its base) and depth (how thick it sits once you squeeze it from the sides). A flexible tape gives more honest numbers here than anything stiff.

Step 2: Include wheels, handles and outer pockets. As mentioned above, airlines like KLM and Ryanair explicitly count wheels, handles and attached pockets as part of the measurement. Measure at the widest point, not just the body of the bag.

Step 3: Re-measure it packed. Pack the backpack the way you'd actually carry it, then measure the depth again. The gap between empty and packed runs 1 to 3 cm on most bags, and more on ones with stuffed outer pockets. If a bag that measures 40x30x15 cm empty comes out at 40x30x18 cm packed, you're already in risk territory at KLM or Lufthansa, whatever the label promised.

Step 4: Buy buffer, not a perfect fit. As a rough rule, if you tend to pack right up to the seams, look for a bag whose manufacturer spec already sits 1 to 2 cm under the airline limit while empty. For 40x30x15 cm hand luggage, that means a model with genuine packed dimensions of 40x30x13 or 40x30x14 cm gives you more room to work with than one sitting exactly on the line.

If you'd rather skip the tape measure, everyday objects give a rough sense of scale: a ring binder runs about 32 cm wide, a 15-inch laptop about 36 cm tall. Both fit easily inside the 40 cm width of a 40x30x15 hand luggage bag, but not inside a 15 cm depth once the laptop travels in its own sleeve. That's exactly why frequent flyers benefit from a dedicated padded laptop compartment, which one of the four picks below happens to have.

All four models below state a fixed 40x30x15 cm in their own product description and don't advertise expansion to 40x30x20 cm. That's the difference from most comparison pages, which never check this at all. Prices and ratings as of 27 August 2026, Amazon.de.

The cheapest one with a broad rating base

The BAGZY Handgepäck Rucksack 40 x 30 x 15 cm sits at 18.69 euros with 4.5 stars from 467 ratings.

For a weekend trip, or purely as an underseat bag with a true 40x30x15 cm on a short hop, that's enough. If you fly a few times a year and don't fancy spending three figures on something holding roughly 18 litres, this is the one. Don't expect premium material. Expect a measurement that's correct.

The one with the most feedback

What stands out about the Handgepäck Rucksack 40 x 30 x 15 cm (British Airways / Wizzair konform) is its own listing: it names British Airways and Wizz Air in the same breath. On this 40x30x15 backpack that's true twice over: for Wizz Air trivially, since 15 is under 20, and for British Airways because the number matches exactly. A rare case of a shop description getting the airline logic right instead of blurring it. Price: 18.69 euros, 4.4 stars from 677 ratings, the largest feedback base of the four.

The best rated

SPAHER's SPAHER Handgepäck Rucksack 40 x 30 x 15 cm costs 22.99 euros and holds the field's best score at 4.6 stars, though from only 170 ratings.

Four euros more than the two entry models. Whether the better build on this 40x30x15 backpack is worth it depends on how often you fly. I'm honestly not sure 170 ratings is enough to prove a quality gap. The average points that way; the sample size doesn't yet.

The one with a laptop compartment

At 32.99 euros the BAGZY Handgepäck Laptop-Rucksack 40 x 30 x 15 cm is the priciest of the four, and it has a padded laptop compartment of its own. 4.3 stars from 525 ratings.

At the 40x30x15 cm this backpack holds, that compartment isn't a nice extra. It's the difference between a laptop that rides safely and a laptop wedged between a charging cable and a water bottle. If you fly for work and book Economy Basic, see our German-language guide to Lufthansa Economy Basic: this backpack quickly becomes your only piece on board, and the 14 euro premium over the cheapest model pays for itself fast.

Soft beats rigid. A soft backpack can be pushed into the sizer; a model with stiff corners can't. On a measurement this tight, that decides more cases than people expect. Between two otherwise similar bags, I'd take the softer one even if it lists a millimetre or two more depth on paper.

External pockets count. KLM and Ryanair both state that wheels, handles and attached pockets are included in the limit. A stuffed front pocket can turn the 15 cm of a 40x30x15 bag into a real 19 cm, which is exactly the point where an otherwise compliant bag still gets flagged at the gate.

Check the weight, not just the size. Pegasus caps at 3 kg, Wizz Air at 10 kg (our German-language coverage). Most of the others state no weight at all for the personal item, which tends to be handled generously in practice, but that's not a guarantee.

Don't pack to the brim. Forum travellers agree fairly consistently that a loosely packed soft bag gets through even when it's borderline on paper. Physics is on your side here if you let it be.

This 40x30x15 cm hand luggage size isn't new. It's just being declared a standard right now. Buy to it today and you have free luggage at nine of eleven major airlines, at Ryanair and Wizz Air too, and you're ready for possible EU rules without having bet on them. If you're only ever buying one bag, I'd take the 15 cm depth. No airline's rule gets more generous than that.