I hope this is not too unrelated, but I have successfully installed the font resizer (beware those with content specified in px and not ems!), and now also have the task of giving user similar capability to switch from default site font type to 'dislexie' font. A simple switch between two type fonts.
In my mind changing type and size must be very similar plugins.
Does any one have any suggestions, or maybe this plugin can be tweaked....?