Standard games are one-on-one with a 60 card minimum for the main deck (up to 15 card sideboard). Winner is determined either by best of one, or best of three games. These games should last standard length for a game (about 20 minutes on average).
Standard is a dynamic format where you build decks and play using cards in your collection from recently released Magic sets. Evolving gameplay and fresh strategies make it one of the most fun and popular ways to play Magic.
How does set rotation work?
Each year, new Magic sets are released and added to Standard. Once per year, when the fall set releases, the four oldest sets in Standard rotate out.