Wizz Air Personal Item 40x30x20: 2026 Free Bag Rules

The Wizz Air personal item is 40x30x20 cm in 2026 — included free with every ticket, even the cheapest fare, as long as it fits under the seat in front of you. That's the whole allowance: one bag, that box, no charge.

Two details matter more than most guides admit. First, Wizz publishes no weight limit for the free personal item per the 2026 guides — size is what's enforced, so a densely packed 40x30x20 bag flies free while a feather-light 46 cm tote gets stopped. Second, "fits under the seat" is taken literally: gate staff use a physical sizer, and your bag goes in packed, not empty.

The figure is confirmed across the major 2026 allowance guides (updated as recently as June 2026) and matches what Wizz Air publishes on its own baggage pages. If you remember a bigger number, you're remembering 2025 — more on that next.

Yes. In November 2025 Wizz Air reduced its free personal item from 45x35x20 cm to 40x30x20 cm — 5 cm off the height and 5 cm off the width, with only the depth unchanged.

That's why 2026 is full of travellers insisting "but it fit last time." It probably did. A bag bought to the old 45x35x20 spec was a perfectly sensible purchase in early 2025 and is now oversized on two of its three sides. The sizer doesn't care when you bought it.

The practical fallout: a huge share of the "Wizz-compatible" bags sold through 2024–2025 no longer pass, and the airline charges an oversize fee at the gate when they don't. Before your next flight, re-measure whatever you own against the new number — packed, not empty, because soft bags grow. If it fails, you're shopping for 40x30x20, which conveniently is now also the standard free size on several other low-cost carriers. We'll get to that.

With Wizz Priority, you can bring a 55x40x23 cm cabin bag up to 10 kg — carried in addition to your free 40x30x20 personal item. Those are the published 2026 numbers: two bags instead of one, with the bigger one capped at 10 kg.

Whether the upgrade is worth it comes down to what you actually pack. If your trip genuinely needs the full 55x40x23 — a fortnight away, bulky gear, gifts for the whole family — Priority is the honest answer, and no compression trick changes that.

But most short trips don't need the second bag; they need a first bag that uses the free 40x30x20 properly. A floppy tote wastes half its own allowance on slouch. A hardshell that compresses a week of clothes into the exact free size makes the extra bag — and the fee that comes with it — simply unnecessary. That's the entire design brief of our backpack, coming up next: pack into the free size, and skip the upsell.

Measure your bag fully packed — if any side exceeds 40, 30 or 20 cm, it no longer fits Wizz Air's free allowance. That one sentence catches most of the bags failing sizers in 2026.

Three traps to avoid. One: manufacturer specs describe an empty bag; soft luggage grows a few centimetres per side once stuffed, which was survivable under 45x35x20 and is fatal under 40x30x20. Two: wheels, handles and outer pockets all count — the sizer is a rigid box, and everything attached to the bag has to fit inside it. Three: measure the bag the way you'll actually hand it over, laptop and toiletries included, not the optimistic empty version.

Grab a tape measure and a door frame, mark 40, 30 and 20, and be honest with yourself. If your packed bag clears all three, fly happy. If it doesn't, far better to learn that in your hallway than at the gate.

Compressed and buckled shut, the Ryanwear Compression Backpack holds exactly 40x30x20 cm — the same figure Wizz Air publishes for its free personal item as of July 2026. It isn't "approximately" the size or "compatible with most airlines": it's built to the exact published number, and the hardshell construction is why that holds up after packing.

Soft bags fail sizers because fabric bulges. Ours can't: two rigid halves close over your clothes and metal buckles lock them down, so the packed shape and the closed shape are the same shape. You overfill above the rim, cinch the drawstrings, press the lid flat — full bodyweight encouraged — and buckle. What you sling over your shoulder is a bag with the geometry of the allowance itself.

It carries a week of rolled outfits plus a 14–15" laptop, and 677 travellers rate it 4.8/5. Not because it dodges fees — because it's a genuinely good backpack that happens to measure precisely what the sizer measures.

The same 40x30x20 cm box Wizz Air now enforces is also the free personal-item allowance on Ryanair, Vueling and Transavia as of July 2026. Europe's low-cost carriers have largely converged on one number — and Wizz's November 2025 change put it on exactly the size the others already share.

For you, that convergence is excellent news: one bag built to 40x30x20 flies free across four of the continent's biggest low-cost networks — and beyond, since TUI fly and Volotea publish the same free size. Buy once, stop reading baggage pages.

The table below lists the current free allowance on the major low-cost carriers in Europe and the USA, switchable between cm and inches, with each airline's name linked to its own official baggage page. (Transavia isn't in the table, but its published free size is the same 40x30x20.) Our backpack's row of green checks isn't a coincidence — it's the design spec. For the full dimension-first breakdown, see our 40x30x20 cabin bag guide.