W3Schools.com

Style fontSize Property

Style Object Reference Style Object

Definition and Usage

The fontSize property sets or returns the font size of the text.

Syntax

Set the fontSize property:

Object.style.fontSize="value|inherit"

Return the fontSize property:

Object.style.fontSize

Value Description
xx-small
x-small
small
medium
large
x-large
xx-large		 Sets the size of the font to different fixed sizes, from xx-small to xx-large
smaller Decreases the font-size by one relative unit
larger Increases the font-size by one relative unit
length Defines the font-size in length units
% Sets the font-size to a % of  the parent element's font size
inherit The value of the fontSize property is inherited from parent element

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The fontSize property is supported in all major browsers.

Note: The value "inherit" is not supported in IE7 and earlier. IE8 requires a !DOCTYPE. IE9 supports "inherit".

Example

Example

Change the font size of the text:

<html>
<head>
<script type="text/javascript">
function displayResult()
{
document.getElementById("p1").style.fontSize="xx-large";
}
</script>
</head>
<body>

<p id="p1">This is some text.</p>
<br />

<button type="button" onclick="displayResult()">Change font size</button>

</body>
</html>

Try it yourself »

Style Object Reference Style Object
W3Schools Certification

W3Schools' Online Certification

The perfect solution for professionals who need to balance work, family, and career building.

More than 10 000 certificates already issued!

Get Your Certificate »

The HTML Certificate documents your knowledge of HTML.

The CSS Certificate documents your knowledge of advanced CSS.

The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.

The jQuery Certificate documents your knowledge of jQuery.

The XML Certificate documents your knowledge of XML, XML DOM and XSLT.

The ASP Certificate documents your knowledge of ASP, SQL, and ADO.

The PHP Certificate documents your knowledge of PHP and SQL (MySQL).

WEB HOSTING
Best Web Hosting
PHP MySQL Hosting
Best Hosting Coupons
UK Reseller Hosting
Cloud Hosting
Top Web Hosting
$3.98 Unlimited Hosting
Premium Website Design
WEB BUILDING
Download XML Editor
FREE Website BUILDER
Best Website Templates Top CSS Templates
CREATE HTML Websites
EASY WEBSITE BUILDER
W3SCHOOLS EXAMS
Get Certified in:
HTML, CSS, JavaScript, XML, PHP, and ASP
W3SCHOOLS BOOKS
New Books:
HTML, CSS
JavaScript, and Ajax
STATISTICS
Browser Statistics
Browser OS
Browser Display
SHARE THIS PAGE