x-height

French renaissance typefaces. The smaller typeface at the bottom has a proportionally higher x-height.

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.

单词	X height
释义	X height 英语百科 x-height 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.
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X height

x-height