 The Japanese already do this for their own characters (using the "kyu", which is "q" in romanized Japanese and is also 0.25 mm), and have metric-sized type for European languages as well.One advantage of the q is that it reintroduces the proportional integer division of 3 mm (12 q) by 6 & 4.During the age of the French Revolution or Napoleonic Empire, the French established a typographic unit of 0.4 mm, but except for the government's print shops, this did not catch on.