What to Use Instead of HTML <big> Tag?

Specify different font-sizes for HTML elements (with CSS):

index.html

Example: HTML

 <html>
<head>
<style>
p.ex1 {
  font-size: 30px;
}
p.ex2 {
  font-size: 50px;
}
</style>
</head>
<body>

<p>This is a normal paragraph.</p>
<p class="ex1">This is a bigger paragraph.</p>
<p class="ex2">This is a much bigger paragraph.</p>

</body>
</html>

Output should be:

Type:	html
Category:	Web Tutorial
Sub Category:	HTML Tag
Uploaded by:	Admin