JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
  <div>item1</div>
  <div>item2</div>
  <div>item3</div>
  <div>item4</div>
  <div>item5</div>
</div>
<br>
<br>
<div class="wrapper">
  <div>item1</div>
  <div>item2</div>
  <div>item3</div>
  <div>item4</div>
</div>

CSS

.wrapper {
  display: flex;
  flex-wrap: wrap;
  background: lightblue;
  justify-content: space-between;
}

.wrapper div {
  width: calc(50% - 5px);
  margin: 5px 0;
  background: gold;
  box-sizing: border-box;
}