In
typography, the
x-height or
corpus size refers to the distance between the
baseline and the
mean line of lower-case letters in a
typeface. Typically, this is the height of the letter
x in the font (the source of the term), as well as the
u,
v,
w, and
z. (Curved letters such as
a,
c,
e,
m,
n,
o,
r and
s tend to exceed the x-height slightly, due to
overshoot.) One of the most important dimensions of a font, x-height is used to define how high lower-case letters are compared to upper-case letters.
