The home page of circle flip is called Home Page. if you haven’t installed it yet, go ahead and load the saved template named Home Layout 1
for loading the template: http://docs.creiden.com/circleflip/content-builder-3/builder-controls/saveload-template/
There is no option to set the title size from the content builder, however, you can edit it using the
Appearance >> Theme Options >> General Style where any changes to the h3 element will affect the IconBox title.
But if you want only to affect the title of the IconBox you can do it using the Custom CSS section, found at
Appearance >> Theme Options >> General Settings >> Advanced by adding the following:
and you can change the font size as needed.
Hope I helped, Cheers.