Open the checker ↗
Advertisement Paid promotional article by Westcoast Digital AB No connection to any airline, airport operator or screening authority. Disclosure
Carry-on rules · read before the belt

Know tonight what the bag is allowed to carry.

Size, contents and the fee — one claim before you pack. More than 100 airlines keep their cabin rules in the checker at carryonsize.com; this page sorts the security and fee questions.

A printed carry-on baggage tag looped around the handle strap of a travel bag
flyhumna · bag claim REF FHN-2241
YUL YWG op. by regional partner · smaller frame
Cabin frame · 55 × 40 × 23 cm Fits
Multi-tool · outer pocket Pull it
Connection · wheels counted Gate fee
Repack once · then pack
Check a bag on carryonsize.com

Cabin frame · personal item · batteries · the gate fee

Sponsored Article. This page is paid promotional content created by Westcoast Digital AB All product claims are the sponsor’s own statements. This is not an independent news article.

The night before

Two legs, two frames

Talia Bensimon measured her spinner at home against the size the airline publishes, and it passed. Wheels, handle, packed full — 54 centimetres, under the 55 the big jet allows. Out of Montreal the bag rode the overhead bin without comment, and the first leg was uneventful.

Toronto Pearson changed the arithmetic. The connection to Winnipeg is flown by the airline’s regional partner, and that operator uses a smaller frame — one that counts the wheels and the handle. Talia’s bag, measured the way that sizer measures, came to 56 centimetres. The frame at the gate refused it, the tag went on, and the gate-check fee joined the trip.

Security had its own verdict an hour earlier. The keychain multi-tool in the bag’s outer pocket — a blade that clears the limit for hold luggage but not for the cabin — was pulled at the checkpoint. Two losses in one airport: the tool at screening, the fee at the gate.

The frame at the gate belongs to the airline that flies the leg — wheels included.
— Talia, on the flight home

The evening before the flight home, she opened the checker first, before the suitcase. She looked up the operator of each leg, not just the airline on the ticket. The regional frame, the tool rule, the liquid rule — all three resolved in a single sitting. The multi-tool went into the hold bag, the wheels came off the measurement, and the pack list came out one item shorter. One repack, at home. Nothing pulled, nothing charged at the desk.

An open suitcase with folded clothing inside, partway through a repack before a flight
One open case, one corrected pack list.
The packing slip

What goes where, item by item

Canadian and international practice, in one list. Before travelling, confirm the current limits with your airline and the screening authority.

SLIP 01 Liquids, gels, creams Cabin

Caps at 100 ml per container, all of them in one clear 1 L pouch. What matters is the bottle size, not how much is left inside.

SLIP 02 Spare batteries & power banks Cabin only

Under 100 Wh rides without asking; 100–160 Wh needs the carrier’s sign-off, maximum two units. A spare battery never goes in the hold.

SLIP 03 Sharp tools & multi-tools Hold

Longer blades and most multi-tools ride in checked luggage. If you are not sure, the hold is the answer.

SLIP 04 Solid food Either

Dry food passes both ways. Anything spreadable or runny counts as a liquid.

SLIP 05 Medicine Cabin

Keep the essentials in the cabin, in the original boxes. Liquid medicine above 100 ml passes when you declare it at screening.

SLIP 06 Duty-free liquids Cabin, sealed

Receipt stays inside the sealed bag, which must remain closed until the final stop.

Carriers differ and rules drift. The checker keeps each airline’s current cabin dimensions; the screening lines above are the common limits, not a promise for your particular flight.

The three lamps

Green, amber, or red at the gate

Clears

Fits the frame and passes screening. The bag rides in the cabin, and the gate stays quiet.

Gate fee

Fails the frame. The airline tags it at the gate for a fee; it flies in the hold, batteries removed first.

Pulled

An item the checkpoint will not pass. It is taken at screening; the bin is the worst place to learn that.

A teal suitcase standing in an empty airport concourse, ready for the next flight
Before you pack

Claim the answer before the belt does

Cabin dimensions for over 100 airlines sit inside carryonsize.com. Find the carrier that flies each leg, measure the bag wheels and all, and sort the contents against the slip above — then pack once.

Open the size checker

No payment details are taken on this page · This page is sponsored content · The checks run on carryonsize.com

Questions

Asked at the packing table

What will the checker tell me?

For the airline you choose it lays out the cabin limits — maximum dimensions, the personal-item allowance, the weight ceiling. Coverage spans over 100 carriers, and the entries track each airline as limits change.

Do I pay to use it?

Nothing to pay. The checker on carryonsize.com is a free reference — no sign-in, no account wall. Open it, look up the airline, compare, done.

Are Canadian carriers listed?

Canadian carriers sit in the list next to the international ones, each with its current sizes and weights. No two airlines agree on limits — that gap is the tool’s reason to exist.

Is a power bank allowed in the hold?

Never. Spare lithium batteries and power banks belong in the cabin, not in checked baggage. Under 100 Wh needs no approval; 100–160 Wh requires the carrier’s say-so, two units per traveller at most. Pull the battery before any gate-check.

Who runs this page?

The publisher of this page is Westcoast Digital AB, a Swedish digital company registered in Trollhättan, org. no. 556845-1966, part of Quality Unlimited AB. Reach the publisher at +46 520-150 00 or [email protected].

Does the check happen here?

It does not. This page describes the tool and its rules; the check itself executes on the tool’s site, carryonsize.com.