Need to draw circle onto which I place image icon like this by applying CSS as shown in image below. Tried the code but unable to accomplish it. Please help.
Required:

HTML:
.dot {
height: 505px;
width: 25px;
background-color: #bbb;
border-radius: 50%;
display: inline-block;
}
<div style="text-align:center">
<h1>Round Dots / Circles</h1>
<span class="dot"></span>
</div>