There are 2 options to resize the icons, with browser zoom or custom CSS.
Superdense is compatible with the native zoom options of your browser, allowing you to resize the icons with simple keyboard shortcuts:
For bigger icons: zoom in with
CTRL and +or
CMD and +(Mac)
For small icons: zoom out with
CTRL and -or
CMD and -(Mac)
For more details, check the docs of Chrome, Safari and Firefox. Browsers are smart enough to remember your zoom settings for the site where you applied it. But it will not automatically zoom in different browsers as well, you need to change settings yourself there too.
To permanently change the icon size on your page, apply custom CSS on your Theme settings.