themes-wordpress/professional-business/sass/variables-site/_fonts.scss

// Font and typographic variables

$font__body: "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif;
$font__heading: $font__body;
$font__code: Menlo, monaco, Consolas, Lucida Console, monospace;
$font__pre: "Courier 10 Pitch", Courier, monospace;

$font__size_base: 22px;
$font__size-ratio: 1.125;

$font__size-xxs:   1em / (1.5 * $font__size-ratio);
$font__size-xs:    1em / (1.25 * $font__size-ratio);
$font__size-sm:    1em / (1 * $font__size-ratio);
$font__size-md:    1em * (1 * $font__size-ratio);
$font__size-lg:    1em * (1.5 * $font__size-ratio);
$font__size-xl:    1em * (2 * $font__size-ratio);
$font__size-xxl:   1em * (2.5 * $font__size-ratio);
$font__size-xxxl:  1em * (3 * $font__size-ratio);

$font__line-height-body: 1.8;
$font__line-height-pre: 1.6;
$font__line-height-heading: 1.2;
$font__line-height-double:  2 * $font__line-height-heading;