A very useful type of text effect is the mono-spaced font, or Typewriter Text. Then specify a SIZE attribute.
Second point is about defaults.
As you probably know, the default value is a value that the browser assumes if you have not told it otherwise. A good example is the font size. If you say nothing it will be 3. If you make faces at your computer it will still be 3. Every browser has a default font setting - font name, size and color.