My husband wanted the medium
"My husband wanted the medium size to fit into the large one because sometimes we can't get 4 large cases under the bed on some cruise ships. Unfortunately the medium size does not fit into the large one. It is shorter but wi der. Disappointing. Luckily on this cruise all four suitcases fit under the bed. We didn't have time to return and get another large one before our trip. The quality is great and certainly takes lots of abuse from airline staff."