Sizing
Size utilities help to easily make an element as wide or as tall (relative to its parent) with the width and height properties.
Width
Width 25%
Width 50%
Width 75%
Width 100%
Width auto
<div class="width-25"></div>
<div class="width-50"></div>
<div class="width-75"></div>
<div class="width-100"></div>
<div class="width-auto"></div>
Height
Height 25%
Height 50%
Height 75%
Height 100%
Height auto
<div class="height-25"></div>
<div class="height-50"></div>
<div class="height-75"></div>
<div class="height-100"></div>
<div class="height-auto"></div>