WP-chgFontSize (wp-chgfontsize) free WordPress plugin

Although users can change the font size of a web page through standard browser settings,
few people knows or remembers how to do it.

WP-chgFontSize is a WordPress plugin that allows users to change dynamically the font size by adding
a text or image selection on your blog. It also stores the user selection on a user’s browser cookie.

It can be used as a widget or directly as a PHP call in the theme.