IATA provides cabin baggage benchmarks amid varying airline rules

International air travel regulations regarding cabin baggage vary significantly between airlines, despite general benchmarks provided by the International Air Transport Association (IATA). While IATA notes a frequent reference dimension of 56 x 45 x 25 cm, travelers must verify specific rules with their individual carriers.

Major airlines maintain distinct policies for different types of luggage, such as small under-seat bags versus larger overhead bin bags. For example, Air France specifies a small bag size of 40 x 30 x 15 cm, while Ryanair offers different dimensions depending on the ticket type, such as 55 x 40 x 20 cm for Priority passengers. easyJet also distinguishes between small under-seat bags and larger cabin bags, with permissions often tied to specific ticket classes like easyJet Plus.