JSFiddle - React, Tailwind, and code Playground

HTML

<div class='container'>
    <div class='close'></div>
</div>

<div class='container big'>
    <div class='close'></div>
</div>

CSS

.container {
    position: relative;
    width: 300px;
    height: 200px;
    margin-bottom: 30px;
    border: 1px solid black;    
}

.container.big {
    width: 400px;
    height: 300px;
}

.close {
    position: absolute;
    right: 5px;
    top: 5px;
    width: 20px;
    height: 20px;
    background-color: red;
}