A medium-sized suitcase is a suitcase between 56 and 70cm high for a vacation of 1 to 2 weeks. The medium-sized suitcases have a capacity of 51 to 79L. This is equal to 10 to 15kg of luggage. There are hard and soft medium-sized suitcases. Hard size M suitcases protect your luggage better from rain and bumps. Soft size M suitcases fit better between other luggage in the car. Most medium-sized suitcases have 4 wheels. That way, you can push the trolley suitcase in front of you and pull it behind you.