CSS Font Size

To change the size of the text, you use the code:

p {font-size: 18px}

This makes all the text in all paragraphs appear in 18 pixels.

To change the fonts of all p tags with a specific class name, use the code:
p.class {font-size: 18px}, where class is the class name that you've given to some of your paragraphs.

To change the fonts of all p tags with specific identifier name, use the code:
p#identifier {font-size:18px}, where identifier is the identifier name that you've given to one of your paragraph.

Next: CSS Bold And Italic Fonts