The Red Book standards specify the playing time of a Compact Disc should not exceed 74 minutes 44 seconds or 650 MB, although most newer CD players will play discs with longer playing time, sometimes up to 80 minutes (700 MB). Discs exceeding the Red Book Standards of 78 minutes may not play satisfactorily on some CD players (it might stop in the middle of your song). Most factories will not guarantee CDs that exceed 78:00 min/sec.