 Ñ, Â, Ö, É), but English rarely needs this.The traditional typographic units are based either on non-metric units, or on odd multiples (such as 35⁄83) of a metric unit.There are no specifically metric units for this particular purpose, although there is a DIN standard sometimes used in German publishing, which measures type sizes in multiples of 0.25 mm, and proponents of the metrication of typography generally recommend the use of the millimetre for typographical measurements, rather than the development of new specifically typographical metric units.