During the web page design process you have to make sure that the text in headings and paragraphs are readable and proptionate to rest of the text. As per W3C recommendations cascading style sheets are the best.
hence implement CSS to define base type size.
Also define by rules <h1> <h2> and <p> tags and block elements that will contain text to increase or reduce size relative to the base size.
There has to be an orderly plan to display written content in a website design for organizing and displaying various kinds of text so the user can find out the usefulness of the content they are seeking. Web designers have to make a clear distinction between display text and body copy in order to implement the formatting on the web pages correctly.