I have a surfboard that has the following dimensions written on it: 6'8" 18 3/4" 25699

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What does the number 25699 mean? I've always seen the third number either be the thickness in inches, or the volume in litres.

  • 1
    It might be the serial number, given that it looks hand-signed.
    – Jon Custer
    Commented Aug 22, 2020 at 14:43
  • 2
    It might also be a date, 25th of June 1999.
    – Jasper
    Commented Aug 22, 2020 at 19:16


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