Metallica's 1991 album Metallica contains 12 tracks.
The sequence starts with “Enter Sandman” and ends with “The Struggle Within.” Between them are songs such as “Sad but True,” “Holier Than Thou,” “The Unforgiven,” “Wherever I May Roam,” “Nothing Else Matters” and “Of Wolf and Man.”
The album's compact track count did not prevent it from having a long running time: the original program lasts 62 minutes and 40 seconds. Several songs are substantial album tracks rather than short radio-style pieces, helping create its broad, full-scale sound.
Track counts can vary when discussing later editions because deluxe reissues and anniversary box sets add demos, live recordings and alternate mixes. The answer of 12 refers to the original studio album's standard track listing, not the expanded material issued for its later anniversary editions.