Fixed width CSS round button

HTML

<a href="http://example.com" class="round-button">Button!!</a>

CSS

a.round-button {
    display:block;
    width:175px;
    height:175px;
    line-height:175px;
    border:10px solid #cfdcec;
  
    color:#e2eaf3;
    text-align:center;
    text-decoration:none;
    background: #4679BD;
    box-shadow: 0 0 3px gray;
    font-family:Verdana;
    font-size:2em;
    font-weight:bold;
}
a.round-button:hover {
    background:#30588e;
}