JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://placekitten.com/64/64" border="1" height="64" width="64">

    <img src="http://placekitten.com/256/256" border="1" height="64" width="64">

    <img src="http://placekitten.com/1024/768" border="1" height="64" width="64">

    <img src="http://placekitten.com/500/400" border="1" height="64" width="64">

    <img src="http://placekitten.com/205/246" border="1" height="64" width="64">

CSS

img {
    max-width:64px;
    max-height:64px;
    width:auto;
    height:auto;
}