<div>
<a href="#" class="btn4">
ボタンはこちら4
</a>
</div>
.btn4 {
display: inline-block;
text-decoration: none;
background: #3F51B5;
color: #FFF;
width: 150px;
height: 150px;
line-height: 150px;
border-radius: 50%;
text-align: center;
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.