JSFiddle - React, Tailwind, and code Playground

HTML

<div id="image">
    <span>12313213</span>
</div>

CSS

#image {
    position:relative;
    width:300px;
    height:300px;
    background:#f5f5f5;
    border:#e4e4e4 1px solid;
}

#image > span {
    position:absolute;
    left:-5px;
    top:10px;
    background:#444;
    color:#FFF;
    padding:5px;
    font-size:12px;
    border-radius:0 2px 2px 3px;
}

#image > span:after {
    content:"";
    position:absolute;
    top:-3px;
    left:0;
    background:#444;
    width:4px;
    height:5px;
    border-radius: 50% 0 0 50%;
}