Sizing · Bootstrap V4.5

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• Relative to the parent
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View on GitHub Sizing

Easily make an element as wide or as tall with our width and height utilities.

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.

Width 25% Width 50% Width 75% Width 100% Width auto

<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>

Height 25% Height 50% Height 75% Height 100% Height auto

<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>

You can also use max-width: 100%; and max-height: 100%; utilities as needed.

PlaceholderMax-width 100%

<img src="..." class="mw-100" alt="...">

Max-height 100%

<div style="height: 100px; background-color: rgba(255,0,0,0.1);"> <div class="mh-100" style="width: 100px; height: 200px; background-color: rgba(0,0,255,0.1);">Max-height 100%</div> </div>

Relative to the viewport

You can also use utilities to set the width and height relative to the viewport.

<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>