The eternal fight for hand luggage in 'low cost' flights or how to pay an extra 200 euros for a small suitcase. EasyJet, Ryanair, Norwegian, Vueling, Wizz Air or Eurowings maintain that their fares are covered by EC Regulation 1008/2008.
IATA, after consulting Airbus and Boeing, has already expressed what the official size should be: a maximum of 55x35x20, with wheels, handles and pockets included. This is another irregularity that is also contemplated in European legislation since they must guarantee assistance during stopovers.