Metallica's standard The Black Album track listing contains 12 songs.
The sequence begins with “Enter Sandman” and ends with “The Struggle Within.” In between are major singles such as “Sad but True,” “The Unforgiven,” “Wherever I May Roam,” and “Nothing Else Matters,” alongside deeper album tracks.
The record's 12-song structure was issued on the standard album, whose total running time is about 62 minutes and 40 seconds. On the original vinyl configuration, the tracks were distributed across four sides, with three songs on each side.
Expanded anniversary editions contain much more material, including demos, live recordings, rough mixes, and bonus tracks. Those larger packages should not be used to count the original album's standard track list. The question refers specifically to the regular 1991 album sequence.