foolscap

noun
  1. 1

    A cap, usually brightly coloured with bells and tassels, as worn by a court jester or fool.

noun
  1. 1

    (strictly) Writing paper sheets measuring 13.25 x 16.5 inches

  2. 2

    (more usually) Such a sheet folded or cut in half, thus approximately 8 x 13.25 inches.

  3. 3

    Printing paper measuring 13.5 inches x 17 inches.

Source: https://en.wiktionary.org/wiki/fool's%20cap, https://en.wiktionary.org/wiki/foolscap