In typography, x-height is the height of a lowercase letter ‘x’ (the part of the letter that does not extend above or below the mean line) in a typeface. It is used as a measurement of the overall quality of a font, and is especially important in determining the legibility of a font at small sizes.
The x-height is also a good indicator of the overall personality of a typeface. A typeface with a large x-height will appear to be more friendly and approachable, while a typeface with a small x-height will appear to be more formal and serious.
The x-height of a font is typically expressed as a percentage of the cap height (the height of a capital letter). For example, a font with an x-height of 70% would have an x-height that is 70% the height of the tallest capital letter in the font.
The x-height is a major factor in the overall legibility of a font. A font with a large x-height will be more legible than a font with a small x-height, especially at smaller sizes. This is because the x-height is the main part of a lowercase letter that is visible, and a larger x-height makes it easier to distinguish one letter from another.
The x-height of a font is the height of the letters in the lower case, and it is a crucial element in determining the readability of a font. A font with a large x-height will be easier to read than a font with a small x-height. The x-height also affects the spacing of the letters in a font, and a font with a large x-height will have more space between the letters than a font with a small x-height. This can make a big difference in the readability of a font, especially at small sizes.