Use the table below as a reference guide for obtaining best quality. For maximum recommended playing time per side to get the best possible quality, please consult your chosen pressing company.
| Format |
Speed |
Pop |
Rock |
Dance / Electronic |
Acoustic / Jazz / Orchestral |
| 12" |
33⅓ RPM |
≤ 17 min |
≤ 16 min |
≤ 14–15 min |
≤ 18–20 min |
| 12" |
45 RPM |
≤ 11 min |
≤ 10–11 min |
≤ 9–10 min |
≤ 12–13 min |
| 10" |
33⅓ RPM |
≤ 11 min |
≤ 10 min |
≤ 9 min |
≤ 12 min |
| 10" |
45 RPM |
≤ 8 min |
≤ 8 min |
≤ 7 min |
≤ 9 min |
| 7" |
45 RPM |
≤ 4.5 min |
≤ 4 min |
≤ 4 min |
≤ 5 min |
For the highest sound quality, shorter side lengths are preferred. Exceeding these recommendations may require compromises in level, bass response, or clarity.
My recommended Length (Maximum Reliability): 74 minutes, which is the original Red Book standard specified. This ensures reliability and compatibility with all CD players, including older models.
Practical Maximum Length (Modern Standards): 78 minutes. Most modern manufacturing plants can reliably produce discs up to this length without significant issues (always check with them first).
Absolute Limit: 79 minutes and 59 seconds (or 700 MB of data). This is generally the absolute maximum capacity for standard 120mm discs.