radius

by rootjang

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<body>
  <div class="round">
    1
  </div>
</body>
</html>

CSS

.round {
  border: 2px solid red;
  border-radius: 20px solid;
}