Carry-on vs personal item: what's the actual difference?

Most articles on this give you one generic size for "the personal item" as if every airline agrees. They don't. We checked the free personal-item dimensions on the airlines' own sites, and the smallest is just over half the volume of the largest.

The basic distinction

A personal item is the smaller bag — a backpack, tote, or laptop bag — that goes under the seat in front of you and is included free on essentially every fare, everywhere. A carry-on (or "cabin bag") is the larger, usually wheeled bag that goes in the overhead locker. On full-service airlines both are typically free. On a growing number of budget carriers — Ryanair, Vueling, Eurowings, Transavia, Wizz Air, Pegasus, and others — the personal item is free but the full cabin bag is a paid add-on.

Personal-item size actually varies a lot

The 40 x 30 x 15 cm limit used by Lufthansa, SAS, KLM and others is the slimmest; easyJet's is wider, longer and deeper — about 80% more volume for the same "free" category. See the full list in personal item size by airline. A bag that's a comfortable personal item on one airline can get flagged as an oversized bag on another. Check the exact number for your airline with our carry-on checker rather than assuming a bag that worked last time will work again.

What to actually put in each one

Pack your personal item with what you'll want mid-flight and can't easily reach from the overhead bin: headphones, a book or tablet, medication, a light layer, snacks, your passport and boarding pass. Keep clothing, toiletries, and anything you won't need until landing in the carry-on instead — you don't want to be digging through an overhead bag mid-flight while people wait in the aisle.

The fare-class trap

The most common way people get caught out isn't the size — it's assuming a full cabin bag is included when it isn't. On several airlines we cover, the base fare includes only the personal item; a proper cabin bag is a separate, sometimes expensive add-on. Our Ryanair, Southwest, and baggage fee guides cover this pattern in more detail — it's worth checking before you pack a normal-sized wheeled bag on a "basic" fare.

Bottom line

"Personal item" is not a standardized size — treat it the same way you'd treat a cabin bag limit and check the exact number for your airline before you fly.

Sources

• Personal-item dimensions from each airline's own published baggage policy, last verified 27 September 2026 (full list: personal item size by airline).
• Carl Friedrik — Carry-on vs. Personal Items: Understanding the Essentials