HTML5 MathML
HTML5 MathML mathsize Attribute
The mathsize attribute sets the font size of a MathML element's content. It accepts length values or size keywords and is most useful on token elements.
Definition and usage
The mathsize attribute changes the size of the glyphs in an element. Values may be a length (such as 20px or 1.5em) or, in older MathML, keywords like small, normal and big. Increasing the size draws attention to a symbol or term.
Which elements use it
- Token elements such as <mi>, <mn>, <mo>, <mtext> and container elements accept mathsize.
Example
<math>
<mrow>
<mi mathsize="24px">x</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
</math>The identifier x is rendered at 24px, larger than the surrounding operator and number.
ℹ️
In MathML Core the CSS font-size property is preferred and length values are widely supported; the older keyword values for mathsize are less reliable.