JSFiddle - React, Tailwind, and code Playground

HTML

<h2>Hight and cornerborder differ</h2>
<button name="foo" type="submit">Submit!</button>
<a href='?bar'>Submit!</a>
<hr/>
<h2>Width equal!</h2>
<button name="foo" type="submit">Submit!</button><br/>
<a href='?bar'>Submit!</a>

CSS

button, a
{    
    font-family: Arial,"Helvetica Neue",Arial,Helvetica,sans-serif;
    -moz-box-sizing: content-box;
    -webkit-box-sizing: content-box;
    box-sizing: content-box;
    background-color: #7da7d8;
    color: #e7e4ed;
    border: 3px solid #f7f7f7;
    border-radius: 8px 8px 8px 8px;
    text-align:center;
    font-weight: normal;   
    display: inline-block;  
    line-height: 1.2em;
    margin: 3px;
    width: 120px;    
    padding: 6px;
    font-size:1.2em;
    text-decoration:none; 
    cursor: pointer; 
}