Box Sizing

Basic usage

Including borders and padding

Use box-border to set an element's box-sizing to border-box, telling the browser to include the element's borders and padding when you give it a height or width.

This means a 100px × 100px element with a 2px border and 4px of padding on all sides will be rendered as 100px × 100px, with an internal content area of 88px × 88px.

Tailwind makes this the default for all elements in our preflight base styles.

<div className="**box-border** h-32 w-32 p-4 border-4 ...">
  <!-- ... -->
</div>

Excluding borders and padding

Use box-content to set an element's box-sizing to content-box, telling the browser to add borders and padding on top of the element's specified width or height.

This means a 100px × 100px element with a 2px border and 4px of padding on all sides will actually be rendered as 112px × 112px, with an internal content area of 100px × 100px.

<div className="**box-content** h-32 w-32 p-4 border-4 ...">
  <!-- ... -->
</div>