The font-size property in CSS is used to specify the size of the text. It can be set using different units like pixels, em, rem, percentages, and more, making it flexible for responsive designs. Font size plays a key role in readability, improving the user experience, and maintaining the overall aesthetics of a website.
Syntax
font-size: medium | xx-small | x-small | small | large | x-large | xx-large | smaller | larger | length | initial | inherit ;
Default Value: medium
Property Values
| Property | Description |
|---|
absolute-size | Sets the font size absolutely. Default is medium. Possible values: xx-small to xx-large. |
relative-size | Adjusts font size relative to parent element. Values: smaller (decreases), larger (increases). |
length | Sets font size using specific lengths like px, cm, etc. |
global | Offers universal settings: initial (default value), inherit (inherits from parent), unset. |
Using Absolute Font Sizes
Tthe CSS font-size property is applied with absolute size values, ranging from xx-small to xx-large. Each text block is styled with different font sizes, allowing for a clear comparison of how the text size changes.
html
<!DOCTYPE html>
<html>
<head>
<title>
CSS font-size property
</title>
<!-- CSS style to set font-size property -->
<style>
.xxsmall {
color: green;
font-size: xx-small;
}
.xsmall {
color: green;
font-size: x-small;
}
.small {
color: green;
font-size: small;
}
.medium {
color: green;
font-size: medium;
}
.large {
color: green;
font-size: large;
}
.xlarge {
color: green;
font-size: x-large;
}
.xxlarge {
color: green;
font-size: xx-large;
}
</style>
</head>
<body>
<h1>font-size property</h1>
<div class="xxsmall">font-size: xx-small;</div>
<div class="xsmall">font-size: x-small;</div>
<div class="small">font-size: small;</div>
<div class="medium">font-size: medium;</div>
<div class="large">font-size: large;</div>
<div class="xlarge">font-size: x-large;</div>
<div class="xxlarge">font-size: xx-large;</div>
</body>
</html>
Output
Using Relative Font Sizes
The CSS font-size property is applied with relative size values, such as smaller and larger, which adjust the font size based on the parent element's font size. This allows for scalable and flexible text sizing.
html
<!DOCTYPE html>
<html>
<head>
<title>
CSS font-size Property
</title>
<!-- CSS property to set font-size -->
<style>
.smaller {
color: green;
font-size: smaller;
}
.larger {
color: green;
font-size: larger;
}
</style>
</head>
<body>
<h1>font-size property</h1>
<div class="smaller">
font-size: smaller;
</div>
<div class="larger">
font-size: larger;
</div>
</body>
</html>
Output
Using Specific Length for Font Size
The CSS font-size property is applied using a specific length unit (px). This allows you to define the exact size of the font, making it consistent across all screen sizes
html
<!DOCTYPE html>
<html>
<head>
<title>
CSS font-size Property
</title>
<!-- CSS property to set font-size -->
<style>
.length {
color: green;
font-size: 40px;
}
</style>
</head>
<body>
<h1>font-size property</h1>
<div class="length">
font-size: length;
</div>
</body>
</html>
Output:
Initial Value for Font Size
The CSS font-size property is set to initial, which resets the font size to the browser’s default value. This ensures the text size follows the default settings unless explicitly defined elsewhere.
html
<!DOCTYPE html>
<html>
<head>
<title>
CSS font-size Property
</title>
<!-- CSS property to set font-size -->
<style>
.length {
color: green;
font-size: initial;
}
</style>
</head>
<body>
<h1>font-size property</h1>
<div class="length">
font-size: initial;
</div>
</body>
</html>
Output
Supported Browsers
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