Comment on Stallion WordPress SEO Theme by SEO Dave.

WordPress SEO Theme Edit the colour scheme css file you are using for the Stallion colour scheme and change the font-size code.

The files are in the folder /stallion-seo-theme/colors/

The files are named after the colour schemes, so if you use the Delicate colour scheme edit style-delicate.css

Look for font-size to edit, there’s around 20 font-size entries to edit, each one changes the font size of a different part of the content.