How do I change the size of social icons on footer mobile version?

Site URL: https://grey-coyote-a7r6.squarespace.com/

Hi,

I'd like to change the size of the social icons in the footer on the mobile version. They are too big and would like to make them smaller.
I'm using the version 7.1

Any help will be much appreciated.

Thanks.

Thank you very much. Works fine!