Maximaphily is a branch of philately involving the study and creation of maximum cards. It is one of eleven classifications of philately recognized by the Fédération Internationale de Philatélie (FIP). A maximum card (Maxi card, maxi-card, MC) is made up of three elements: the postcard, the stamp and the postmark. The object of Maximaphily is to obtain a card where the stamp and picture are in close concordance, ideally with an appropriate cancellation, too. If all three elements are concordant, then that card truly is a maximum  card (hence the name Maximaphily). Preferably, the image on the postcard should not be simply an enlargement of the image on the stamp. There are exceptions. For example: a work of art, like a painting (not a detail of it), is often shown in its entirety, both on the postcard and on the stamp of the Maxi card.

Here some MCs issued by different Postal authorities, philatelic associations and private philatelists are presented.