CSS fontsize Property (original) (raw)

CSS font-size Property

Last Updated : 28 May, 2026

The font-size property in CSS is used to define the size of text on a webpage. It helps improve readability, design, and the overall appearance of website content.

The font size can be set using units like px, em, rem, and %.
It supports responsive and flexible text styling.
Proper font sizing improves user experience and webpage aesthetics.

**Syntax

**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

The 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 `

CSS font-size property

<!-- 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>

font-size property

<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>

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 `

CSS font-size Property

<!-- CSS property to set font-size -->
<style>
    .smaller {
        color: green;
        font-size: smaller;
    }

    .larger {
        color: green;
        font-size: larger;
    }
</style>

font-size property

<div class="smaller">
    font-size: smaller;
</div>
<div class="larger">
    font-size: larger;
</div>

**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 `

CSS font-size Property

<!-- CSS property to set font-size -->
<style>
    .length {
        color: green;
        font-size: 40px;
    }
</style>

font-size property

<div class="length">
    font-size: length;
</div>

**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 `

CSS font-size Property

<!-- CSS property to set font-size -->
<style>
    .length {
        color: green;
        font-size: initial;
    }
</style>

font-size property

<div class="length">
    font-size: initial;
</div>