Plus four

Plus four may refer to:


 * Plus fours, trousers that extend four inches below the knee
 * Commodore Plus/4, a home computer released in 1984
 * Morgan +4, a sports car produced by the Morgan Motor Company
 * ZIP+4, a United States ZIP code add-on
 * Max Roach + 4, a 1956 album by Max Roach
 * Sonny Rollins Plus 4, a 1956 album by Sonny Rollins