The personal item is the bag that flies free on every fare, and on basic economy it is often the only bag that flies at all. It also has the least honest marketing of any luggage category: bags “sized for under the seat” that measure nothing of the sort, and packing lists written for a 40L carry-on with the title changed. This one is written for the actual space, roughly 15 to 25 liters at two-thirds full, and for the actual airline numbers.
If you are not sure which of your bags counts as the personal item, that is settled in personal item vs carry-on. If you have a carry-on as well, the week-long version of this list is the one-bag packing list. This page is the under-seat bag on its own.
The box you are packing into
There is no standard personal-item size, only each airline’s. These are the published figures for the major US carriers, and they are the reason the list below is as short as it is.
Published personal-item dimensions by US airline| Airline | Personal item |
|---|
| American | 18 x 14 x 8 in |
| United | 17 x 10 x 9 in |
| Delta | No published dimensions; must fit under the seat |
| JetBlue | 17 x 13 x 8 in |
| Southwest | 18.5 x 8.5 x 13.5 in |
| Frontier | 18 x 14 x 8 in |
| Spirit | 18 x 14 x 8 in |
United’s 17 x 10 x 9 in is the one to plan around if you fly several carriers, because a bag that fits it fits the rest. Note the 8 in depth on most of the others: a soft bag packed to two-thirds squashes to it, and a full one does not. The full table, including the European carriers, is the carry-on size guide.
The list: two nights
Wear on the plane
- The bulkiest shoes you are bringing. This is not optional; a second pair of shoes is the single item that pushes a personal item over the line.
- The heaviest layer: jacket, hoodie or blazer.
- Trousers or jeans, the pair you will wear both days if it comes to it.
Clothes in the bag
- Two tops, rolled.
- One spare bottom: shorts, a skirt or lightweight trousers, rolled.
- Two sets of underwear and socks.
- One light layer if the evening needs it: a merino tee or a thin cardigan. Skip a second jacket.
- Sleepwear only if you will not sleep in the light layer.
Wash kit
- One quart-size clear bag with everything liquid in 3.4 oz (100 ml) containers or smaller, per the TSA 3-1-1 rule.
- Toothbrush, a travel-size toothpaste, deodorant, a razor. Solid versions of anything else you can find; solids do not count against the liquids bag.
- Medication in its original packaging, in the bag rather than checked.
Tech
- Laptop or tablet in the sleeve against the back panel, ready to come out at screening.
- One charger that covers laptop and phone, one cable of each type you need, in a small case.
- A power bank under 100 Wh, terminals covered, in the cabin bag. It cannot go in checked luggage; the rules are in power banks on planes.
- Headphones.
Documents and the rest
- Passport or ID, cards, a little cash, in the pocket you can reach with the bag under the seat.
- Phone, and nothing else you would grab in a hurry that is not in that same pocket.
- A packable tote or a small packable daypack, flat against the back, for the day out and the trip home.
What does not make the cut
A second pair of shoes. The single biggest item by volume, and the easiest to leave: wear the pair that suits the trip. If two pairs are genuinely required, the trip needs a carry-on.
A full-size toiletry kit. A hanging wash bag with four compartments is a carry-on item. For a personal item the wash kit is the quart bag plus a toothbrush, possibly in a compact pouch like the Narwey below, and nothing larger.
A third day of clothes. Two nights fits; three fits if you repeat the bottom and wear the heavy layer. Four does not, and the answer is not a bigger personal item, because there is no such thing: the box is the box.
Anything that needs a cube. At this volume, cubes are mostly overhead. One small cube for underwear and socks is useful; a full set is a suitcase habit. The count by bag size is in how many packing cubes you need.
The order it goes in
- Laptop or tablet in the sleeve, against the back panel.
- The rolled bottom flat across the base of the main compartment.
- The two rolled tops on top of it, side by side.
- The underwear cube or bundle, and the light layer, filling the outer half.
- The wash kit in the front pocket, where it comes out at screening without opening the main compartment; the cable case flat against the laptop sleeve.
- Documents, phone and power bank in the top or quick-access pocket, reachable with the bag under the seat.
- The packable tote flat against the back, behind the laptop sleeve if the bag has space there.
Then measure it packed, not empty, the way a gate agent would: how to measure a backpack. If it is over the depth figure, the problem is almost always the shoes or a second layer.
Three bags this list fits into
The list above is bag-agnostic, but it assumes a soft bag of 20 to 25L with a laptop sleeve and a front pocket. These three cover the range, from the cheapest under-seat bag we recommend to the one we would use as the day bag once we landed.
#1The budget under-seat bag: pack it two-thirds full
Taygeer 35L Under-Seat Travel Backpack
Marketed as an under-seat personal item, and it works as one when you don't max it out — 35L is generous for a personal item, so packed full it can read as a carry-on. Best used as a soft, squashable bag you keep to the smaller side for basic-economy fares.
Strengths
- +Soft, squashable body that pushes down to fit under a seat
- +Lots of pockets and a luggage-strap sleeve for a roller
- +Very inexpensive
Trade-offs
- −At 35L, packed full it can exceed a strict personal-item limit — keep it light
- −No structure or hip belt; a hand-and-shoulder bag
| Capacity | 35 L |
|---|
| Weight (empty) | Not published |
|---|
| External dimensions | Not published |
|---|
| Carry-on fit (our read) | Personal-item sized |
|---|
| Laptop sleeve | 15.6 in |
|---|
| Material | Not published |
|---|
| Warranty | Not published |
|---|
Fit note. 35L is bigger than most airlines' personal-item allowance if you fill it, but because it's soft it compresses to fit. Pack it two-thirds full and it slides under the seat; stuff it and you're gambling at the gate.
Specs read from the product listing, on July 21, 2026. “Not published” means the maker does not state that figure.
#2The personal item that becomes the day bag
Osprey Daylite Expandable 26+6 Travel Pack
The daypack that does a second job. 26 liters is a genuine day bag — city walking, a laptop, a jacket — and the expansion adds six more when the flight home has to swallow what the trip accumulated. It's the one pack here we'd happily use as a personal item under the seat and as the day bag once you land.
Strengths
- +26L handles a real day out, not just a water bottle and a wallet
- +The +6L expansion is there for the trip home, then zips away
- +Osprey's All Mighty Guarantee, which almost nothing else at daypack money carries
Trade-offs
- −Expanded, it stops being reliably personal-item sized — zip it down to fly
- −Costs several times what a packable stuff-sack daypack does
| Capacity | 26 L |
|---|
| Weight (empty) | Not published |
|---|
| External dimensions | Not published |
|---|
| Carry-on fit (our read) | Convertible / expandable |
|---|
| Laptop sleeve | Not published |
|---|
| Material | Not published |
|---|
| Warranty | Osprey All Mighty Guarantee |
|---|
Fit note. The '26+6' is the whole spec. Fly it at 26L, where a soft pack of that size sits inside most personal-item allowances, and treat the extra 6L as an at-destination feature — expanding it at the gate is exactly when you least want to be measured.
Specs read from the product listing, on August 11, 2026. “Not published” means the maker does not state that figure.
#3The work-trip version: lay-flat laptop section
MATEIN 17" TSA-Friendly Carry-On Backpack
A larger MATEIN with a lay-flat TSA laptop section — the pick if you fly with a big laptop and want the security lane to go quickly. Roomy enough for a light overnight as a personal item, though it's a work bag at heart.
Strengths
- +TSA lay-flat laptop compartment speeds up security
- +Fits up to a 17" laptop with room for a day's kit
- +USB pass-through and luggage sleeve
Trade-offs
- −Work-bag ergonomics, not travel-pack comfort
- −Budget build
| Capacity | Not published |
|---|
| Weight (empty) | Not published |
|---|
| External dimensions | Not published |
|---|
| Carry-on fit (our read) | Personal-item sized |
|---|
| Laptop sleeve | 17 in |
|---|
| Material | Not published |
|---|
| Warranty | Not published |
|---|
Fit note. The lay-flat laptop panel is the reason to pick this over the smaller MATEIN — it means you don't unpack the laptop at security. Still a work bag, not a one-bag travel pack.
Specs read from the product listing, on July 21, 2026. “Not published” means the maker does not state that figure.
The Taygeer is roomier than the list needs, which is exactly why it works: at two-thirds of its 35L it squashes under a seat, and its dimensions are not published, so the two-thirds rule is the whole method. The Osprey Daylite Expandable is the one we would carry for the trip itself, 26L flown zipped down, with a lifetime guarantee that nothing else at day-bag money carries. The MATEIN is for the weekend that is really a work trip: a 17 in lay-flat laptop section so the machine is scanned in place at standard screening. For the wash kit, the compact Narwey hanging bag is sized for travel-size bottles rather than a bathroom shelf; it is compared against its full-size sibling in BAGSMART vs Narwey.
If the personal item rides on a roller
The two-bag traveler packs this list differently: the under-seat bag holds the laptop, the documents and the day-out kit, and the clothes go in the wheeled carry-on. In that case the feature that matters is a trolley sleeve, so the bag rides on the roller handle through the terminal, and the bags with one are in best travel backpacks with a luggage sleeve.