I have inside Information mahahaha!! ok that was a little less than scary, Anyway if you have gotton the buffy magazine Issue 51 on Nov 2003 you would have seen there was a simiralr question asked in the "Fang Mail" of the folowing.
Q: What does Faiths saying, 'Five by Five' actually mean? I know it is something along the lines of 'good' or 'fine', but where does it come from? -- Laura, via Email.
A: According to the Random House Histerical Dictionary of Americian Slang. Vol. 1, A-G, by J.E. Lightner 'Five by Five' or 'Five by' is the term used in radio communications to mean, "I'm hearing you loud and clear." it can also mean "Okay" or "everything's perfect." The term has even been linked to the size of the bed in a pick-up truck and obesity. (although Eliza Dushku dosent fit my definition of obesity!) -- Rob Francis.