JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <ul class="thumb-list">
        <li> <a href=""><img  src="https://lh4.googleusercontent.com/-ae0Q_J_FRHo/AAAAAAAAAAI/AAAAAAAAAH0/JAgZxJY6Bb4/photo.jpg" alt="BlaBla"></a>

        </li>
        <li> <a href=""><img  src="https://lh3.googleusercontent.com/-xG41LLlqjq8/AAAAAAAAAAI/AAAAAAAAASY/bv7wy3udbVg/photo.jpg" alt="BlaBla"></a>

        </li>
        <li> <a href=""><img  src="https://pbs.twimg.com/profile_images/378800000409299941/87ccae607fe35081777f49c05b0fbbd2.png" alt="BlaBla"></a>

        </li>
    </ul>
</div>

CSS

.container {
    position: relative;
    padding-top:64px;
    padding-bottom: 64px;
    margin: 0 auto;
    width: 728px;
    border: 1px solid black;
}
.thumb-list {
    margin: 0 auto;
    position: relative;
    list-style: none;
}
.thumb-list li {
    position: relative;
    display: inline;
    margin: 15px;
}
.thumb-list li a img {
    height: 128px;
    width: 128px;
    border: 20px solid rgba(0, 0, 0, 0.3);
    -moz-border-radius: 50%;
    -webkit-border-radius: 50%;
    border-radius: 50%;
    transition:all 1s ease;
    -webkit-transition:all 1s ease;
    -moz-transition:all 1s ease;
}
.thumb-list li a img:hover {
    -moz-border-radius: 30%;
    -webkit-border-radius: 30%;
    border-radius: 30%;
}