JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li><a href="#" class="btn">Button 1</a></li>
    <li><a href="#" class="btn">A really long button</a></li>
    <li><a href="#" class="btn">Size Chart</a></li>
</ul>

CSS

.btn{
    background: rgba(0,167,253,0.5);
    border-top-left-radius: 0;
    border-top-right-radius: 4px;
    border-bottom-left-radius: 4px;
    display: inline-block;
    padding: 5px 10px;
    border: 1px solid #0093df;
    position: relative;
    font-size: 1em;
    font-family: Arial, sans-serif;
    text-decoration: none;
}
.btn:after, .btn:before {
    content: '';
    position: absolute;
    right: -1px;
    bottom: -1px;
    width: 0;
    height: 0;
    border: 4px solid white;
    border-color: transparent white white transparent;
    z-index: 2;
}
.btn:before {
    border: 5px solid #0093df;
    border-color: transparent #0093df #0093df transparent;
    z-index: 1;
}