JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li class="normal">normal</li>
  <li class="resized">resized</li>
</ul>

CSS

ul{
  list-style-type:none;
}
.normal:before{
  content: url('https://avatars0.githubusercontent.com/u/1342004?v=3&s=32');
}
.resized:before{
  content: url('https://avatars0.githubusercontent.com/u/1342004?v=3&s=32');
  zoom:50%;
}