Source: https://tailwindcss.com/docs/background-size

v4.1

Backgrounds
background-size

Backgrounds

background-size

Utilities for controlling the background size of an element's background image.

| Class | Styles | | --- | --- | | bg-auto | background-size: auto; | | bg-cover | background-size: cover; | | bg-contain | background-size: contain; | | bg-size-(<custom-property>) | background-size: var(<custom-property>); | | bg-size-[<value>] | background-size: <value>; |

Examples

Filling the container

Use the bg-cover utility to scale the background image until it fills the background layer, cropping the image if needed:

<div class="bg-[url(/img/mountains.jpg)] bg-cover bg-center"></div>

Filling without cropping

Use the bg-contain utility to scale the background image to the outer edges without cropping or stretching:

<div class="bg-[url(/img/mountains.jpg)] bg-contain bg-center"></div>

Using the default size

Use the bg-auto utility to display the background image at its default size:

<div class="bg-[url(/img/mountains.jpg)] bg-auto bg-center bg-no-repeat"></div>

Using a custom value

Use the bg-size-[<value>] syntax to set the background size based on a completely custom value:

<div class="bg-size-[auto_100px] ...">  <!-- ... --></div>

For CSS variables, you can also use the bg-size-(<custom-property>) syntax:

<div class="bg-size-(--my-image-size) ...">  <!-- ... --></div>

This is just a shorthand for bg-size-[var(<custom-property>)] that adds the var() function for you automatically.

Responsive design

Prefix a background-size utility with a breakpoint variant like md: to only apply the utility at medium screen sizes and above:

<div class="bg-auto md:bg-contain ...">  <!-- ... --></div>

Learn more about using variants in the variants documentation .

📄 tailwindcss/docs/background-size