Vinyl comes in different sizes mainly based on how much music is contained on the record. A standard 7-inch single is smaller than a full-length album because it contains less music, and is intended to be less expensive. But there's also a limit to how much sound can be crammed onto a side of vinyl of any size before the quality of the audio deteriorates because the grooves are too narrow to contain all of the detail of the sound recording. This is why many records released as a single CD have to be issued as a double album on vinyl — 12-inch sides typically top out around 22 minutes, but albums designed for CD typically spill over 60 minutes — and why many 7-inch singles feature edits of songs that are normally extended over the five-minute mark. But this limitation can be turned to an advantage in that putting less music on a larger side can improve sound quality, which is part of why many singles designed for DJ use are pressed as 10- and 12-inch records to accommodate extended mixes while allowing for excellent sound quality.