Suitcase size varies depending on the brand. In general, a medium-sized suitcase measures between 61 and 63 centimeters in height, which translates to 24 to 24.8 inches.
According to Top Travel Tips, medium-sized suitcases are recommended for a person who is traveling for up to two weeks or two people traveling for up to one week. If traveling on an airline, weight needs to be considered as well. The weight of the suitcase varies with the brand, and traveling limits can change over time. Many suitcases have wheels for convenient transport. Another factor to consider when purchasing a suitcase is the material. Soft-sided luggage is more expandable, while hard-sided luggage offers greater protection.