JSFiddle - React, Tailwind, and code Playground

HTML

<div class="circle">
		                <span class="number">1</span></div>

CSS

.circle {
    border-radius: 100%;
    height: 50px;
    width: 50px;
    text-align: center;
    background: #616161;
    margin: 0 auto;
}

.circle .number {
    margin-top: 0.10em;
    font-size: 1.5em;
    font-weight: bold;
    font-family: sans-serif;
    line-height: 1.4em;
    color: #ffffff;
}