--- 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 utility API in `_utilities.scss`. Includes support for `25%`, `50%`, `75%`, `100%`, and `auto` by default. Modify those values as you need to generate different utilities here. {{< example >}} <div class="w-25 p-3" style="background-color: #eee;">Width 25%</div> <div class="w-50 p-3" style="background-color: #eee;">Width 50%</div> <div class="w-75 p-3" style="background-color: #eee;">Width 75%</div> <div class="w-100 p-3" style="background-color: #eee;">Width 100%</div> <div class="w-auto p-3" style="background-color: #eee;">Width auto</div> {{< /example >}} {{< example >}} <div style="height: 100px; background-color: rgba(255,0,0,0.1);"> <div class="h-25 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 25%</div> <div class="h-50 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 50%</div> <div class="h-75 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 75%</div> <div class="h-100 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 100%</div> <div class="h-auto d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height auto</div> </div> {{< /example >}} You can also use `max-width: 100%;` and `max-height: 100%;` utilities as needed. {{< example >}} {{< placeholder width="100%" height="100" class="mw-100" text="Max-width 100%" >}} {{< /example >}} {{< example >}} <div style="height: 100px; background-color: rgba(255,0,0,.1);"> <div class="mh-100" style="width: 100px; height: 200px; background-color: rgba(0,0,255,.1);">Max-height 100%</div> </div> {{< /example >}} ## Relative to the viewport You can also use utilities to set the width and height relative to the viewport. ```html <div class="min-vw-100">Min-width 100vw</div> <div class="min-vh-100">Min-height 100vh</div> <div class="vw-100">Width 100vw</div> <div class="vh-100">Height 100vh</div> ``` ## Sass ### Utilities API Sizing utilities are declared in our utilities API in `scss/_utilities.scss`. [Learn how to use the utilities API.]({{< docsref "/utilities/api#using-the-api" >}}) {{< scss-docs name="utils-sizing" file="scss/_utilities.scss" >}}