JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="circle"></div>
  <div class="circle"></div>
</div>

SCSS

.container {
  display: flex;
}

.circle {
  flex: 0 0 auto;
  width: 30vw;
  height: 30vw;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
  border: 2px solid #ccc;
}