A 45 RPM vinyl record is a type of phonograph record that spins at a speed of 45 revolutions per minute. Typically, these records are 7 inches in diameter and are often used to release single songs. The format became popular in the 1940s and 1950s, allowing music lovers to enjoy their favorite tracks on a portable medium. The 45 RPM records are usually made of vinyl, a durable plastic material that helps produce high-quality sound. They often feature a large center hole, which allows them to be played on a turntable. Many iconic songs from artists like Elvis Presley and The Beatles were released as 45s, making them a significant part of music history.