JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<select class="form-control"></select>

CSS

.form-control {
    border-radius: 0;
    margin: 15px;
    width: 50px;
}