The standard dimensions for bags are Small (20 inch), Medium (24 inch) and Large (28 inch). Small bags are used as cabin luggage; medium and large are used as check-in luggages. Each kind of travel calls for a certain kind of luggage. We, at Nasher miles, understand that not all bags are made for all travelers; which is why we bring you options in three sizes. You also have the option to buy a set of 3 bags from the same collection. (small, medium and large bags that look alike).