Bulma size is used to set your website's content font size, there are 7 different sizes class in Bulma. You can use any of them to define the size of your context.
Size classes:
- is-size-1: The size of this class is pre defined which is font-size of 3rem.
- is-size-2: The size of this class is pre defined which is font-size of 2.5rem.
- is-size-3: The size of this class is pre defined which is font-size of 2rem.
- is-size-4: The size of this class is pre defined which is font-size of 1.5rem.
- is-size-5: The size of this class is pre defined which is font-size of 1.25rem.
- is-size-6: The size of this class is pre defined which is font-size of 1.0rem.
- is-size-7: The size of this class is pre defined which is font-size of 0.75rem.
Example: Below example illustrate the size class in Bulma.
<!DOCTYPE html>
<html>
<head>
<title>Bulma Typography</title>
<link rel='stylesheet'
href=
'https://cdn.jsdelivr.net/npm/bulma@0.9.3/css/bulma.min.css'>
</head>
<body class="has-text-centered">
<h1 class="is-size-2 has-text-success">
GeeksforGeeks
</h1>
<b>Bulma Size</b>
<br>
<div class="container">
<p class="is-size-1">GeeksforGeeks</p>
<p class="is-size-2">GeeksforGeeks</p>
<p class="is-size-3">GeeksforGeeks</p>
<p class="is-size-4">GeeksforGeeks</p>
<p class="is-size-5">GeeksforGeeks</p>
<p class="is-size-6">GeeksforGeeks</p>
<p class="is-size-7">GeeksforGeeks</p>
</div>
</body>
</html>
Output:

Reference: https://bulma.io/documentation/helpers/typography-helpers/#size