Carry-on bag size checker

Enter your bag's size, pick an airline and see whether it fits, with the airline's own limit.

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How we calculate

We compare your bag with the airline's own published carry-on size. Orientation does not matter: we put your three measurements in order, longest to shortest, and do the same for the limit. The bag fits when each of the three is within the limit. The weight check applies only when the airline publishes a weight limit and you enter your bag's weight. If a fare includes no cabin bag (for example easyJet, Ryanair, Wizz Air and United Basic Economy on most trips), we check your bag against the free under-seat item instead and say so.

Three worked examples from the data:

  • A 55 x 35 x 20 cm bag on Delta (limit 56 x 35 x 23 cm): every side is within the limit, so it fits.
  • A 56 x 45 x 25 cm bag, IATA's general reference size, on Ryanair's paid cabin bag (55 x 40 x 20 cm): the long side is 1 cm over, the middle 5 cm over and the short 5 cm over, so it is too big.
  • A 22 x 14 x 9 in bag on Southwest (24 x 16 x 10 in) fits with 2 in to spare on the long side. The same bag is 55.9 x 35.6 x 22.9 cm, which is over Qatar Airways' 50 x 37 x 25 cm on the long side, so it is too big there.

We copy each airline's numbers in the unit it publishes. Where an airline publishes only inches or only centimetres, the other unit is converted and marked as converted. Where an airline's page shows no weight limit, we say "no limit on the page we read", which is not the same as no limit. IATA's 56 x 45 x 25 cm figure is a general reference for airlines, not a rule, and the smaller 55 x 35 x 20 cm "Cabin OK" size was paused in 2015. Spirit Airlines stopped flying in May 2026, so it is not listed.

Airline limits we use
United States
ItemRule
Delta Air LinesCabin bag: 56 x 35 x 23 cm / 22 x 14 x 9 in (included). No weight limit published on the page. Under-seat item: size not published (free). Delta lists no Basic Economy difference on its page.
United AirlinesCabin bag: 56 x 35 x 23 cm / 22 x 14 x 9 in (included). No weight limit published on the page. Under-seat item: 43 x 25 x 22 cm / 17 x 10 x 9 in (free). Fare differences: Basic Economy: no overhead bag.
American AirlinesCabin bag: 56 x 36 x 23 cm / 22 x 14 x 9 in (included). No weight limit published on the page. Under-seat item: 45 x 35 x 20 cm / 18 x 14 x 8 in (free).
Southwest AirlinesCabin bag: 24 x 16 x 10 in (included). No weight limit published on the page. Under-seat item: size not published (free).
JetBlueCabin bag: 55.88 x 35.56 x 22.86 cm / 22 x 14 x 9 in (included). No weight limit published on the page. Under-seat item: 43.2 x 33 x 20.32 cm / 17 x 13 x 8 in (free).
Alaska Airlines (incl. Hawaiian)Cabin bag: 22 x 14 x 9 in (included). No weight limit published on the page. Under-seat item: size not published (free).
Frontier AirlinesCabin bag: 24 x 16 x 10 in (not free on this fare). Weight 35 lb. Under-seat item: 18 x 14 x 8 in (free). Fare differences: Base fare: no overhead bag; Bundles (Economy/Premium/Business): size 24 x 16 x 10 in.
Allegiant AirCabin bag: 55 x 40 x 25 cm / 22 x 16 x 10 in (not free on this fare). No weight limit published on the page. Under-seat item: 45 x 35 x 20 cm / 18 x 14 x 8 in (free).

Checked on 27 October 2026.

Canada
ItemRule
Air CanadaCabin bag: 55 x 40 x 23 cm / 21.5 x 15.5 x 9 in (included). No weight limit published on the page. Under-seat item: 43 x 33 x 16 cm / 17 x 13 x 6 in (free). Fare differences: Economy Basic (bought on/after 3 Jan 2025): no overhead bag.
WestJetCabin bag: 56 x 36 x 23 cm / 22 x 14 x 9 in (included). No weight limit published on the page. Under-seat item: 41 x 33 x 15 cm / 16 x 13 x 6 in (free). Fare differences: UltraBasic: no overhead bag.
Porter AirlinesCabin bag: 55 x 40 x 23 cm / 21.5 x 15.5 x 9 in (included). No weight limit published on the page. Under-seat item: 43 x 33 x 16 cm / 17 x 13 x 6 in (free). Fare differences: Basic: no overhead bag; Standard/Flexible/Freedom/Navigate/Ultimate: size 55 x 40 x 23 cm / 21.5 x 15.5 x 9 in.

Checked on 27 October 2026.

UK and Ireland
ItemRule
British AirwaysCabin bag: 56 x 45 x 25 cm / 22 x 18 x 10 in (included). No weight limit published on the page. Under-seat item: 40 x 30 x 15 cm / 16 x 12 x 6 in (free). Fare differences: Economy Basic (hand baggage only): size 56 x 45 x 25 cm / 22 x 18 x 10 in.
easyJetCabin bag: 56 x 45 x 25 cm (not free on this fare). Weight 15 kg. Under-seat item: 45 x 36 x 20 cm (free). Fare differences: Standard (no add-on): no overhead bag; Large cabin bag add-on / easyJet Plus / Inclusive Plus: size 56 x 45 x 25 cm.
RyanairCabin bag: 55 x 40 x 20 cm (not free on this fare). Weight 10 kg. Under-seat item: 40 x 30 x 20 cm (free). Fare differences: Basic/Value: no overhead bag; Priority & 2 Cabin Bags: size 55 x 40 x 20 cm.
Jet2Cabin bag: 56 x 45 x 25 cm (included). Weight 10 kg. Under-seat item: 40 x 30 x 20 cm (free).
Virgin AtlanticCabin bag: 56 x 36 x 23 cm / 22 x 14 x 9 in (included). Weight 10 kg. Under-seat item: 40 x 30 x 15 cm (free). Fare differences: Economy Light: size 56 x 36 x 23 cm / 22 x 14 x 9 in.
TUI AirwaysCabin bag: 55 x 40 x 20 cm (included). Weight 10 kg. Under-seat item: 40 x 30 x 20 cm (free).
Aer LingusCabin bag: 55 x 40 x 24 cm / 21.5 x 15.5 x 9.5 in. Weight 10 kg. Under-seat item: 40 x 30 x 20 cm / 15.5 x 11.5 x 8 in (free). Fare differences: Saver (Europe): no overhead bag; Plus/Advantage/AerSpace, and all transatlantic: size 55 x 40 x 24 cm / 21.5 x 15.5 x 9.5 in.

Checked on 27 October 2026.

Europe
ItemRule
Wizz AirCabin bag: 55 x 40 x 23 cm (not free on this fare). Weight 10 kg. Under-seat item: 40 x 30 x 20 cm (free). Fare differences: Basic: no overhead bag; WIZZ Priority: size 55 x 40 x 23 cm.
LufthansaCabin bag: 55 x 40 x 23 cm (included). Weight 8 kg. Under-seat item: 40 x 30 x 15 cm (free). Fare differences: Economy Basic (short/medium-haul): no overhead bag; Economy Light/Comfort/Flex: size 55 x 40 x 23 cm.
Air FranceCabin bag: 55 x 35 x 25 cm / 21.7 x 13.8 x 9.9 in. Weight 12 kg. Under-seat item: 40 x 30 x 15 cm / 16 x 12 x 6 in (free). Fare differences: Economy Basic: no overhead bag; Economy (other fares): size 55 x 35 x 25 cm / 21.7 x 13.8 x 9.9 in.
KLMCabin bag: 55 x 35 x 25 cm. Weight 12 kg. Under-seat item: 40 x 30 x 15 cm (free). Fare differences: Economy Basic: no overhead bag; Economy Light/Standard/Flex: size 55 x 35 x 25 cm.

Checked on 27 October 2026.

Australia and New Zealand
ItemRule
QantasCabin bag: 56 x 36 x 23 cm / 22 x 14 x 9 in (included). Weight 7 kg. Under-seat item: size not published (free). Fare differences: Domestic Economy (Australia): size 56 x 36 x 23 cm / 22 x 14 x 9 in.
JetstarCabin bag: 56 x 36 x 23 cm (included). Weight 7 kg. Under-seat item: size not published (free). Fare differences: Starter (travel before 2 Feb 2027): size 56 x 36 x 23 cm; Starter (travel from 2 Feb 2027, JQ): no overhead bag; Priority Carry-on (from 2 Feb 2027): size 56 x 36 x 23 cm. From 2 Feb 2027 Starter fares include an under-seat bag only; an overhead bag needs Priority Carry-on.
Virgin AustraliaCabin bag: 56 x 36 x 23 cm (included). Weight 8 kg. Under-seat item: 45 x 33 x 20 cm (free).
Air New ZealandCabin bag: 55 x 40 x 23 cm / 21 x 16 x 9 in (included). Weight 7 kg. Under-seat item: size not published (free).

Checked on 27 October 2026.

Middle East and Turkey
ItemRule
EmiratesCabin bag: 55 x 38 x 22 cm / 21.6 x 14.9 x 8.6 in (included). Weight 7 kg. Under-seat item: size not published.
Qatar AirwaysCabin bag: 50 x 37 x 25 cm / 20 x 15 x 10 in (included). Weight 7 kg. Under-seat item: size not published (free).
Turkish AirlinesCabin bag: 55 x 40 x 23 cm (included). Weight 8 kg. Under-seat item: 40 x 30 x 15 cm (free).

Checked on 27 October 2026.

IATA guideline (not a rule)
ItemRule
General referenceIATA gives 56 x 45 x 25 cm (22 x 18 x 10 in), including wheels and handles, as a general reference for what many airlines allow, with weight limits often from 5 kg. Each airline sets its own limits.
Cabin OK (2015)A different, smaller 55 x 35 x 20 cm size proposed in 2015 and paused by IATA on 17 June 2015. It is not the 56 x 45 x 25 figure.

Checked on 27 October 2026.

Sources and last checked

Limits change and some depend on the fare, route or aircraft. We copy each airline's own published figures and show the date we read them. The gate agent has the final say, so check your airline's page and your booking before you fly. Also: UK cabin bag size. Read more: Carry-on bag size: what IATA says.