A common carry-on limit is about 22 x 14 x 9 inches (56 x 36 x 23 cm) including wheels and handles, plus a smaller personal item. Low-cost carriers are stricter and often only include the personal item free. Weight limits of 7–10 kg apply on many non-US airlines. Check your airline.
There’s no single global standard, but the numbers cluster.
Typical full-service allowance:
- Cabin bag around 22 x 14 x 9 in (56 x 36 x 23 cm), wheels and handles included.
- Plus one personal item (a backpack or laptop bag) that fits under the seat.
- US airlines generally don’t weigh cabin bags; many international and all low-cost carriers enforce 7–10 kg.
Low-cost carriers (Ryanair, easyJet, Wizz, Spirit, Frontier): the free allowance is often only the small under-seat item. A larger cabin bag costs extra, and gate fees for an oversize bag are punishing — measure and pay online in advance.
Practical tips:
- Check the exact dimensions on your airline’s site the day you book.
- Soft-sided bags squeeze into sizers that hard shells won’t.
- If you fly mixed carriers, pack to the strictest one on your itinerary.
Our carry-on system guide shows how to pack for up to ten days in a single cabin bag.
Related questions
How many bags can I bring on a flight?
Most economy fares allow one cabin bag plus one personal item; checked bags depend on the fare and route. Long-haul international economy usually includes one free checked bag; US domestic and short-haul European fares often include none. Basic economy may allow only the personal item. Full answer →
How do I avoid baggage fees?
Fly carry-on only within the airline's size and weight limits, hold a co-branded credit card or elite status that includes a free bag, book a fare class that includes one, or fly airlines that still include bags (most long-haul carriers do). Full answer →
What should I pack in my carry-on?
Everything you can't afford to lose or need in flight: passport and documents, medication, electronics and chargers, valuables, one change of clothes, a liquids bag under 100 ml, snacks, a refillable bottle, and comfort items (mask, earplugs, layer). Full answer →
Airline, airport and government rules change without notice. Treat this as a starting point and confirm with the airline or authority for your specific trip. Request a correction if something is out of date.