Cabin baggage dimensions: what to check before you fly

At the airport, a few centimetres can be the difference between taking your case on board and checking it in at the gate. There is no single universal cabin baggage size. Your airline, fare, travel class and sometimes the aircraft determine what you can bring.

Start with your booking

Read the baggage conditions attached to your ticket, rather than relying on the airline’s general homepage. Check how many pieces are included, their maximum dimensions, any weight limit and the difference between a small personal item and a larger cabin case. Some basic fares include only the smaller item that fits beneath the seat.

Measure the case as it travels

Include wheels, handles and anything else that protrudes. IATA notes that cabin allowances vary by airline and that these parts count towards the size. A case that seems to fit without its wheels may still exceed the limit at the gate.

‘Cabin size’ does not guarantee acceptance

A case described as cabin size is designed around common allowances; it is not automatically accepted with every fare. The ALTAIR Original Cabin is listed as 55 × 37 × 22 cm, including wheels and handles. Compare those figures with the rules for your journey, particularly if your airline allows less than 22 cm in depth.

Remember weight and the journey home

Weigh the case after packing. Leave a little margin if you plan to shop while away. Connections and return flights may have different carriers or fares, so check every leg of your booking.

Four checks before departure

1. Confirm how many pieces your fare includes.
2. Measure your case with its wheels and handles.
3. Weigh it once packed.
4. Repeat the checks for connections and your return flight.

IATA’s baggage guidance explains the general position. Only your airline can confirm the conditions that apply to your ticket.