Change the social buttons on Marketo's social buttons to larger 32px size. This does not adjust any other parts of the code, so just use as a starting point.

gistfile1.css

.cf_widget .cf_socialicons .cf_socialicon {
    float: left;
    height: 32px;
    margin-right: 3px;
    width: 32px;
}
.cf_widget .cf_socialicons .cf_facebook {
    background: url("http://www.pedowitzgroup.com/images/facebook_32.png") no-repeat scroll left center transparent;
}
.cf_widget .cf_socialicons .cf_linkedin {
    background: url("http://www.pedowitzgroup.com/images/linkedin_32.png") no-repeat scroll left center transparent;
}
.cf_widget .cf_socialicons .cf_twitter {
    background: url("http://www.pedowitzgroup.com/images/twitter_32.png") no-repeat scroll left center transparent;
}