Il n’existe pas une dimension universelle
Each company defines its own limits. Some distinguish a small baggage under the seat from a cabin baggage stored in the upper compartment. The chosen ticket can also change what is included.
The rule displayed by the company at the time of the trip is always true. Check it directly before departure, even if you have already borrowed this company before.
Measure all prepared baggage
Measure height, width and depth once the bag is filled. Outer pockets and handles can increase congestion.
Weigh the luggage with its contents. A lightweight bag leaves more margin, but it must remain strong and comfortable enough.

Small bag and large cabin bag
Before booking, precisely identify the category included in your ticket.
- The small baggage must generally be capable of being placed under the seat.
- The large cabin baggage uses the upper compartment and may require a pay option.
- Weight limits can be independent of dimensions.
- Rules may differ on a flight operated by a partner company.
Notre conseil pratique
Keep a small margin instead of filling the bag to its absolute limit. You can easily place it in a template and keep room for objects used during the journey.
If your itinerary includes several airlines, follow the strictest rule so you do not have to repack during the journey.
Frequently asked questions
Is there a universal cabin size?
No. Companies and tariffs apply different rules. With several companies, hold the most restrictive limit.
Is a 40 L bag still in the cabin?
No. Volume is not enough: a 40 L can exceed in depth or height. Check the three outer dimensions.
Can we compress a soft bag?
Yes, if its content actually allows to place it in the template. A full outer pocket may be sufficient to make it non-compliant.
Sources and dates
Each date corresponds to the indicated source, not a new check of the entire catalogue. The above benchmarks specify the scope of the references that document them.
Preparing for the Future
Turn this guide into a concrete decision.
Use the right tool or complementary content rather than start your search from the beginning.
Get a selection suitable for your trip
Your duration, budget and priorities can change the best choice.

