Social Links – changing icons, adding links

Hi great theme! Nice & simple & fresh!
Thankyou!

I’m trying to change the size of the social media icons.
But they shrink…
I’m guessing this has to do with the “@2x” part of the name, ie:”[email protected]”
??

I uploaded new images, but they either did not appear or were smaller.

However I can’t find where I need to go to edit, in css or otherwise.

I’d also like to add Instagram, and found a workaround by inserting my Instagram url into, a social link I’m not using, like myspace.

But it’s not a complete solution – where can I edit and/or add in new social links ?

Thanks for your help
??