The font-size attribute refers to the size of the font from baseline to baseline when multiple lines of text are set solid in a multiline layout environment.

Note: As a presentation attribute, font-size can be used as a CSS property. See the css font-size property for more information.

As a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altGlyph>, <text>, <textPath>, <tref>, and <tspan>

<svg viewBox="0 0 200 30" xmlns="">
  <text y="20" font-size="smaller">smaller</text>
  <text x="100" y="20" font-size="2em">2em</text>

Usage notes

Value <absolute-size> | <relative-size> | <length-percentage>
Default value medium
Animatable Yes

For a description of the values, please refer to the CSS font-size property.


Specification Status Comment
CSS Fonts Module Level 3
The definition of 'font-size' in that specification.
Recommendation No change
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'font-size' in that specification.
Recommendation Initial definition

Browser compatibility

BCD tables only load in the browser

See also