JSFiddle - React, Tailwind, and code Playground

HTML

<div class="list">
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
</div>

CSS

.list {
  display: flex;
  flex-flow: row wrap;
  width: 20rem;
}

.item {
  height: 5rem;
  width: 5rem;
  background-color: blue;
  margin: .2rem;
}

.item:nth-child(1) {
  height: 10rem;
  width: 10rem;
}