With an extra large suitcase, you can always take enough luggage for vacations longer than 3 weeks. These trolley suitcases are around 81cm high, so you can take more than 110L of luggage with you. That's at least 20kg. Some XL suitcases are expandable. With an extra zipper, you can increase the space in your suitcase. That way, you always have space for souvenirs or new clothes. There are soft shell and hard shell suitcases. Want an extra sturdy trolley suitcase? Choose a suitcase made of curv. These trolley suitcases are the most sturdy and weigh the least.