It is used to size the element. By using sizing utility, you can easily make an element as wide or as tall (relative to its parent) with our width and height utilities. Includes support for 25%, 50%, 75%, and 100% by default.
Width and height utilities are generated from the $sizes Sass map in _variables.scss. You can modify these values when you need to generate different utilities here.
Sizing by Width
Following is the syntax for sizing an element by width:
Sizing by Height
Following is the syntax for sizing an element by height:
Max Width & Height
You can also set width and height as maximum.