JSFiddle - React, Tailwind, and code Playground

HTML

<div style="width:200px;height:20px;text-align:center;background:#ccc">width:200px</div>
<select style="padding:0px;border:1px solid #000;"><option>padding:0px;border:1px</option></select><br>
<select style="padding:5px;border:1px solid #000;"><option>padding:5px;border:1px</option></select><br>
<select style="padding:5px;border:3px solid #000;"><option>padding:5px;border:3px</option></select><br>

JavaScript

var setWidth = function(){
    $('select').width(200);
};
setWidth(); //set width immediately
window.setTimeout(setWidth, 2000); //set width in 2 second delay