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 10%, 25%, 33%, 50%, 66%, 75%, 100%, and auto by default. Modify those values as you need to generate different utilities here.

10: 10%,
25: 25%,
33: 33%,
50: 50%,
66: 66%,
75: 75%,
100: 100%,
auto: auto
Width 10%
Width 25%
Width 33%
Width 50%
Width 66%
Width 75%
Width 100%
Width auto
<div class="w-10 p-3" style="background-color: #eee;">Width 10%</div>
<div class="w-25 p-3" style="background-color: #eee;">Width 25%</div>
<div class="w-33 p-3" style="background-color: #eee;">Width 33%</div>
<div class="w-50 p-3" style="background-color: #eee;">Width 50%</div>
<div class="w-66 p-3" style="background-color: #eee;">Width 66%</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>

Use responsive width classes to adjust widths to various breakpoint with .w-$breakpoint-$size

w-lg 10% / w-md 100%
w-lg 25% / w-md 75%
w-lg 33% / w-md 66%
w-lg 50% / w-md 50%
w-lg 66% / w-md 33%
w-lg 75% / w-md 25%
w-lg 100% / w-md 10%
Width auto
<div class="w-lg-10 w-md-100 p-3 bg-300">w-lg 10% / w-md 100%</div>
<div class="w-lg-25 w-md-75 p-3 bg-300">w-lg 25% / w-md 75%</div>
<div class="w-lg-33 w-md-66 p-3 bg-300 bg-300">w-lg 33% / w-md 66%</div>
<div class="w-lg-50 w-md-50 p-3 bg-300">w-lg 50% / w-md 50%</div>
<div class="w-lg-66 w-md-33 p-3 bg-300">w-lg 66% / w-md 33%</div>
<div class="w-lg-75 w-md-25 p-3 bg-300">w-lg 75% / w-md 25%</div>
<div class="w-lg-100 w-md-10 p-3 bg-300">w-lg 100% / w-md 10%</div>
<div class="w-lg-auto w-md-auto p-3 bg-300">Width auto</div>
Height 10%
Height 25%
Height 33%
Height 50%
Height 66%
Height 75%
Height 100%
Height auto
<div style="height: 100px; background-color: rgba(255,0,0,0.1);">
  <div class="h-10 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 10%</div>
  <div class="h-25 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 25%</div>
  <div class="h-33 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 33%</div>
  <div class="h-50 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 50%</div>
  <div class="h-66 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 66%</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>