---
layout: docs
title: Sizing
description: Easily make an element as wide or as tall with our width and height utilities.
group: utilities
toc: true
---
## Relative to the parent
Width and height utilities are generated from the `$sizes` Sass map in `_variables.scss`. Includes support for `25%`, `50%`, `75%`, `100%`, and `auto` by default. Modify those values as you need to generate different utilities here.
{% capture example %}
Width 25%
Width 50%
Width 75%
Width 100%
Width auto
{% endcapture %}
{% include example.html content=example %}
{% capture example %}
Height 25%
Height 50%
Height 75%
Height 100%
Height auto
{% endcapture %}
{% include example.html content=example %}
You can also use `max-width: 100%;` and `max-height: 100%;` utilities as needed.
{% capture example %}
{% include icons/placeholder.svg width="100%" height="100" class="mw-100" text="Max-width 100%" %}
{% endcapture %}
{% include example.html content=example %}
{% capture example %}
{% endcapture %}
{% include example.html content=example %}
## Relative to the viewport
You can also use utilities to set the width and height relative to the viewport.
{% highlight html %}
Min-width 100vw
Min-height 100vh
Width 100vw
Height 100vh
{% endhighlight %}