JSFiddle - React, Tailwind, and code Playground

HTML

<div class="mask">
    <img src="http://i.stack.imgur.com/MFao1.png" />
</div>

CSS

.mask {
  display: inline-block;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  overflow: hidden;
}

img {max-width: 100%;}