The standard edition of Metallica, also known as The Black Album, contains 12 tracks.
The sequence begins with “Enter Sandman” and ends with “The Struggle Within.” Between them are major songs including “Sad but True,” “The Unforgiven,” “Wherever I May Roam,” and “Nothing Else Matters.”
The original vinyl configuration divided the 12 tracks across four sides: tracks 1–3 appeared on side A, tracks 4–6 on side B, tracks 7–9 on side C, and tracks 10–12 on side D. That arrangement is why the album’s sequence is often discussed in groups of three.
The number 12 applies to the standard album, not to later deluxe editions. The 2021 30th-anniversary box set added many discs of demos, live performances, and unreleased material. Those expanded releases contain far more tracks, but they do not change the number on the original 1991 album.