The personal item is the bag most travelers underuse. It is the smaller piece you can bring alongside your carry-on, and on many fares — including basic economy — it is the one bag you are guaranteed for free. Pack it well and it can carry a surprising amount.
Here is what counts as a personal item, the size airlines expect, and how to be sure yours slides under the seat without a second look.
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Table of Content
- Quick answer
- What counts as a personal item
- The usual size
- Personal item vs carry-on
- Budget airlines and personal-item-only fares
- How to make sure it fits
- FAQs
Quick answer
A personal item is a small bag that must fit under the seat in front of you. There is no universal size, but a common allowance is around 18 x 14 x 8 inches (45 x 35 x 20 cm). It is usually free, even on basic economy, and typical examples are a handbag, laptop bag or small backpack. Sizes vary by airline, so check yours.
What counts as a personal item
A personal item is anything small enough to go under the seat rather than in the overhead bin. That includes:
- A handbag or purse
- A laptop bag or briefcase
- A small backpack or daypack
- A small tote or camera bag
Because your carry-on may end up in the overhead bin, keep the things you actually want in flight — phone, charger, documents, headphones, snacks — in the personal item where you can reach them.
The usual size
Unlike the checked-bag standard, there is no single personal-item size across airlines. A frequently seen allowance is around 18 x 14 x 8 inches (45 x 35 x 20 cm), but some airlines are more generous and budget carriers are often much stricter, with smaller dimensions they actively enforce at the gate. The reliable rule of thumb is simple: if it slides fully under the seat in front, it passes. Airlines such as American publish their exact personal-item dimensions.
Personal item vs carry-on
The personal item goes under the seat; the carry-on goes in the overhead bin and is larger. If your “personal item” is really a full-size backpack, it will be treated as your carry-on instead. For the cabin bag rules, see our guide to carry-on luggage size limits.
| Personal item | Carry-on | |
|---|---|---|
| Where it goes | Under the seat in front | Overhead bin |
| Typical size | About 18 x 14 x 8 in (45 x 35 x 20 cm) | 22 x 14 x 9 in (56 x 36 x 23 cm) on major US airlines |
| Cost on basic or budget fares | Usually free | Often extra |
| Examples | Handbag, laptop bag, small backpack | Wheeled cabin bag, full-size backpack |
Budget airlines and personal-item-only fares
On budget airlines and basic economy fares, the personal item is often the only bag included for free — a full carry-on and any checked bag cost extra. If you are flying a low-cost carrier, this makes the personal item worth maximising, and worth measuring carefully, because these airlines are the strictest about enforcing the limit. Check what a paid bag would cost with our baggage fee calculator before you decide.
How to make sure it fits
- Choose a soft-sided bag — it flexes under the seat where a hard case will not.
- Do not overstuff it; a bulging bag measures larger than an empty one.
- Check your airline’s stated personal-item dimensions, especially on budget carriers.
- Keep in-flight essentials on top so you are not digging around at your feet.
A quick pre-flight check
Personal-item dimensions differ noticeably between airlines, and budget carriers are the strictest, so the only figure that counts is the one published for the airline and fare you have actually booked. Measure your bag including its wheels, handles and any bulging pockets, because those are what a gate sizer catches — the published size is the maximum the bag must fit within when full, not when empty.
Soft bags have a real advantage here: a squashy backpack or tote will give and compress into a sizer in a way a rigid case will not, which can be the difference between boarding freely and paying a gate fee. If you are flying a personal-item-only fare, pack into a bag you have measured against that airline’s limit, keep it under the seat in front rather than in the overhead bin, and you will avoid the most common and most irritating budget-airline charge of all.
Bags sized for under the seat
These are Amazon affiliate links. As an Amazon Associate, Boarding Gate earns from qualifying purchases, at no extra cost to you. How this works.
- Away The Everywhere Bag: 16.3 x 10.2 x 7.3 in and soft-sided, so it gives a little at the sizer. Check price on Amazon
- coowoz 25L Travel Backpack: A budget backpack built around the 18 x 14 x 8 in size; check it against your airline’s own limit. Check price on Amazon
Frequently asked questions
What is a personal item on a flight?
A personal item is the smaller bag you are allowed in addition to your carry-on, and it has to fit under the seat in front of you. Typical examples are a handbag, a laptop bag, a small backpack or a briefcase.
What size can a personal item be?
There is no universal size. A common allowance is around 18 x 14 x 8 inches (45 x 35 x 20 cm), but it varies a lot by airline, and budget carriers are often stricter. The real test is whether it fits fully under the seat in front, so check your airline’s figure.
What can I bring as a personal item?
A purse or handbag, a laptop bag, a small backpack, a briefcase, or a small tote. It should hold the things you want during the flight, since your carry-on may go in the overhead bin.
Is a personal item free?
On most airlines, yes, a personal item is included even on basic economy fares where a full carry-on is not. On some budget airlines the personal item is the only bag you get for free, with everything larger costing extra.
Does a backpack count as a personal item or a carry-on?
It depends on size. A small daypack that fits under the seat counts as a personal item. A larger travel backpack is treated as your carry-on and must meet the cabin bag size limit instead.