Length of Ethernet frame

[M. A.]

Dear group,   I have one question which has bugged me for ages, that is, what exactly is the maximum length for an Ethernet frame (assuming no other encapsulation like ISL)?  The number 1518 keeps on getting mentioned, but I just can't seem to work that number out:   The way I see is:   Preamble:    8 DA: 6 SA: 6 Data: 1500 FCS: 4   All those add up to 1524!!!!  How do people get the number of 1518???   Much appreciate any help!   Martin