International carry-on size: the complete guide
International carry-on rules are not universal. The same suitcase that boards smoothly in New York can be weighed at the gate in London, sized at the desk in Tokyo, or sent to the hold on a budget flight in Europe. The rules change by airline, route, and aircraft – and missing them can mean unexpected fees or a forced gate-check.
This guide breaks down international carry-on size and weight requirements clearly – with practical reference tables for major airlines, regional differences, and what to look for when choosing a suitcase that travels well across borders.
Need a carry-on that fits within common international limits? Browse: Carry-On Luggage.
The "safe" international carry-on size
For most international travel, a carry-on within 22 × 14 × 9 inches (55 × 35 × 23 cm) works on the majority of major airlines. This is the size used by most North American carriers and matches the size accepted by many international full-service airlines.
However, two factors complicate the picture:
- Some international airlines use stricter dimensions – often 55 × 40 × 20 cm or smaller
- Many international airlines enforce weight limits – something most US domestic carriers do not
The most important rule: always confirm the airline's current carry-on rules directly before flying. Policies change, and rules can vary by aircraft, fare class, and route.
Why international carry-on rules differ from domestic
Travellers used to flying within the US often hit unexpected friction abroad. The biggest differences:
- Weight limits are common. Most international airlines weigh carry-ons at check-in or the gate. US carriers rarely do.
- Smaller dimensions on budget airlines. Carriers like Ryanair and easyJet have stricter carry-on sizes than mainline airlines.
- Fare class matters more. Economy carry-on allowances are often more limited than business or first class.
- Personal item rules vary. Some international airlines allow only one cabin bag total, not a carry-on plus a personal item.
- Aircraft-specific limits. Smaller regional aircraft can have stricter overhead bin rules.
International carry-on weight limits
This is where most international travellers get caught off guard. A carry-on that fits dimensionally can still exceed the airline's weight limit – and full-service international carriers do enforce it.
| Airline | Economy carry-on weight limit | Notes |
|---|---|---|
| British Airways | Up to 23 kg (51 lb) | Among the most generous weight allowances – passengers must still be able to lift it into the overhead bin |
| Lufthansa | 8 kg (17.6 lb) | Standard economy allowance; higher cabin classes get more |
| Air France / KLM | 12 kg (26 lb) – combined cabin baggage | Includes both carry-on and personal item combined |
| Emirates | 7 kg (15 lb) | Higher allowances in business and first class |
| Qatar Airways | 7 kg (15 lb) | Strictly enforced on most routes |
| Singapore Airlines | 7 kg (15 lb) | Combined weight of all cabin baggage |
| Cathay Pacific | 7 kg (15 lb) | Standard economy – higher in premium cabins |
| ANA / JAL | 10 kg (22 lb) | Generous compared to many Asian carriers |
| Turkish Airlines | 8 kg (17.6 lb) | Standard economy weight allowance |
| Air Canada | No specific weight limit | Must fit dimensions and be liftable into the overhead |
| Ryanair | 10 kg (22 lb) with Priority & 2 Cabin Bags | Free small bag only on standard fare; overhead carry-on requires upgrade |
| easyJet | 15 kg (33 lb) for the large cabin bag option | Free small under-seat bag; large cabin bag is fare-dependent |
Weight allowances can change. Travellers should verify with each airline before flying, especially for routes operated by partner carriers or codeshare flights.
International carry-on size limits
Carry-on dimensions vary more than travellers expect. The table below highlights the most common international sizes.
| Airline | Carry-on max (cm) | Carry-on max (in) |
|---|---|---|
| British Airways | 56 × 45 × 25 | 22 × 18 × 10 |
| Lufthansa | 55 × 40 × 23 | 21.7 × 15.7 × 9 |
| Air France | 55 × 35 × 25 | 21.7 × 13.8 × 9.9 |
| KLM | 55 × 35 × 25 | 21.7 × 13.8 × 9.8 |
| Emirates | 55 × 38 × 22 | 22 × 15 × 8 |
| Qatar Airways | 50 × 37 × 25 | 20 × 15 × 10 |
| Singapore Airlines | ≤ 115 (sum of L+W+H) | ≤ 45.3 (sum of L+W+H) |
| ANA | 55 × 40 × 25 | 21.7 × 15.7 × 9.8 |
| JAL | 55 × 40 × 25 | 22 × 16 × 10 |
| Turkish Airlines | 55 × 40 × 23 | 21.7 × 15.7 × 9 |
| Air Canada | 55 × 40 × 23 | 21.5 × 15.5 × 9 |
| Virgin Atlantic | 56 × 36 × 23 | 22 × 14 × 9 |
| Ryanair | 55 × 40 × 20 (Priority bag) | 21.7 × 15.7 × 7.9 |
| easyJet | 56 × 45 × 25 (large cabin bag) | 22 × 18 × 10 |
For a complete reference covering both domestic and international airlines: Carry-on size limits by airline (2026).
Regional differences travellers should know
Carry-on rules tend to cluster by region. Knowing the regional pattern helps travellers prepare more confidently.
North America. Most carriers cluster around 22 × 14 × 9 inches (56 × 36 × 23 cm). Weight limits are uncommon on US carriers; Air Canada follows the dimensional rule but doesn't enforce a strict weight limit either.
Europe – mainline carriers. British Airways, Lufthansa, Air France, KLM, and similar carriers typically use sizes around 55 × 40 × 23 cm (or 56 × 45 × 25 cm for British Airways). Weight limits are enforced and typically range from 8 to 23 kg.
Europe – budget carriers. Ryanair, easyJet, Wizz Air, and similar airlines have stricter rules. The free allowance is usually a small under-seat bag only. A larger cabin bag often requires a paid upgrade or priority boarding.
Middle East and Asia. Carriers like Emirates, Qatar Airways, Singapore Airlines, and Cathay Pacific typically allow around 55 × 38 × 22 cm with 7 kg weight limits. ANA and JAL run slightly more generous at 10 kg.
Australia and New Zealand. Qantas and Air New Zealand typically allow 56 × 36 × 23 cm with a 7 kg weight limit on domestic and short-haul international flights.
How to choose a carry-on for international travel
The best international carry-on does three things well – it fits within common size limits, stays light enough to meet weight rules, and travels smoothly across the kinds of surfaces international trips actually involve.
- Choose dimensions that meet stricter international limits. A suitcase sized for 55 × 40 × 23 cm fits more international airlines than one sized for the US standard.
- Prioritize lightweight construction. When weight limits are 7–8 kg, every pound of empty suitcase matters.
- Look for smooth, quiet wheels. Cobblestone streets, tile floors, and uneven sidewalks reveal differences in wheel quality quickly.
- Choose a stable telescopic handle. International travel often involves long terminal walks and frequent transfers.
- Pick a structured interior. Compression and organization help fit more without exceeding weight allowances.
For a deeper sizing breakdown: How to choose a carry-on. For lighter, impact-friendly travel: Polycarbonate vs aluminum luggage explained.
Carry-on or personal item – what counts as what
One of the trickier parts of international travel is the personal item rule. Not every international airline allows both a carry-on and a personal item – and gate agents may ask travellers to combine bags before boarding.
- Most full-service international airlines allow one carry-on plus one personal item (handbag, laptop bag, small backpack)
- Many European budget airlines allow only one small under-seat bag on standard fares; a larger cabin bag requires a paid upgrade
- Some Asian carriers count the combined weight of all cabin baggage rather than separate items
For a personal item that fits cleanly under most international seats: Metro Bags.
Common mistakes international travellers make
- Packing to a US carrier's standards before flying internationally – the return leg often catches travellers off guard
- Forgetting weight, not just size – a perfectly sized bag can still trigger a fee
- Bringing too many liquids – security rules are stricter on some routes than others
- Assuming budget airline rules match mainline rules – they don't, and the fees are often steep
- Not factoring in connecting flights – the strictest carrier on a multi-leg trip sets the rule
- Overpacking on the return trip – souvenirs and gifts can push a bag over weight quickly
Smart approach: on multi-airline international itineraries, pack to the strictest carrier's limits. It's the simplest way to avoid surprises at any gate.
How to measure a carry-on correctly
Airline sizers measure the outside of the suitcase – including wheels and handles. Most international gate agents will use a sizer box, and going over by even a centimeter can mean a forced check-in.
- Height: measure from the ground to the top of the case shell – including wheels
- Width: measure the widest point – including side handles
- Depth: measure the deepest point – including front curvature or expansion zippers
- Handle: measure with the telescopic handle fully retracted
For expandable suitcases: always measure with the bag fully packed, since expanded depth can push it over the limit. Browse: Expandables.
Where to start with Monos
- Carry-On – everyday travel and most international short trips: Shop carry-on
- Check-In – longer international stays and more space: Shop check-in
- Expandables – flexibility for return trips with more to bring home: Shop expandables
- Metro Bags – personal items and in-flight essentials: Shop Metro
Helpful next reads: How to pack a carry-on for a week What to do if an airline damages your luggage
