The icons in the footer are definitely too big. There is a setting, where I can change the size of the icons in the HTML-editor. But odd thing - they cannot be made smaller than 30px - why that? I think I would need them probably 15-20px.
You can add custom CSS code which would render images smaller.
To be honest, you are the first person who told us that he would like those icons to be smaller than 30 pixels
I was picking some sites randomly to check, they all have icons much smaller than 30px - so I am wondering, why you are wondering that smaller than 30px is unusual? 🙂
https://www.joomla.org/ - 14px
https://www.nytimes.com/ - 13px
https://www.uber.com/de/en/ - 14px
https://www.lemonde.fr/ - 20px
This is related to accessability, especially for mobile devices. It's reccommended to have touch targets with a minimum of 48x48 px, which is about the size of a fingertip.
48x48 is ideal size of icons.