Cabin (up to 56cm): Suitable for carry-on luggage with most airlines or for the gym.
Medium (57 to 69 cm): Suitable for excursions and trips of a few days. The luggage you will check in at the airport.
Large (from 70cm): Also known as "family-sized", they are suitable for trips lasting many days, relocations, or transporting equipment such as ski or diving gear.
Cabin luggage: Duffel bags with suitable dimensions so that they are allowed as carry-on luggage, meaning they fit in the airplane cabin’s overhead compartment.
Personal Item: Duffle bags with suitable dimensions to be allowed as a personal item, meaning they fit under the airplane seat. The most common dimensions are 40x20x25cm.