JSFiddle - React, Tailwind, and code Playground

HTML

<div class='flex-container seven'>
    <div>1</div>
    <div>2</div>
    <div>3</div>
    <div>4</div>
    <div>5</div>
    <div>6</div>
    <div>7</div>
</div>

CSS

.flex-container {
  display: flex;
	flex-flow: row wrap;
	justify-content: flex-start;
}
.flex-container div {
    margin: 10px 10px;
    flex: 0 1 20%;
}