JSFiddle - React, Tailwind, and code Playground

HTML

<div class="cnt-div">
  <img src="http://www.web-plus-plus.com/Images/Articles/vertical-centering-elements-html/cat.png" />
</div>

CSS

.cnt-div {
  position: relative;
  width: 400px;
  height: 120px;
  background-color: #fafafa;
  border: solid 1px lightgray;
}
.cnt-div > img {
  position: absolute;
  width: 64px;
  height: 64px;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  margin: auto;
}