A midi dress is one of the best types of dresses that a woman can own. You can wear it to a formal event or even to a cocktail party. A midi dress can be worn for almost any event. Just make sure you choose a dress that can match the event. A midi dress is a good addition to any woman's closet. Just as its name implies, a midi dress is a dress that falls between the mini dress and the maxi dress. Midi dresses can have a hemline that reaches somewhere between the knee and the ankle. The midi dress has a bell-like silhouette and they come in several styles and designs.