@Irina: It depends on the social icons that you use. All the css is shown below. You can add in whatever you need in “Appearance => Theme Options => Custom CSS” box.
.social-profile ul li.facebook a {
background-position: 0 -44px;
}
.social-profile ul li.twitter a {
background-position: -44px -44px;
}
.social-profile ul li.rss a {
background-position: -88px -44px;
}
.social-profile ul li.you-tube a {
background-position: -132px -44px;
}
.social-profile ul li.linkedin a {
background-position: -176px -44px;
}
.social-profile ul li.tumblr a {
background-position: -220px -44px;
}
.social-profile ul li.viemo a {
background-position: -264px -44px;
}
.social-profile ul li.slideshare a {
background-position: -264px -44px;
}
.social-profile ul li.dribbble a {
background-position: -308px -44px;
}
.social-profile ul li.my-space a {
background-position: -352px -44px;
}
.social-profile ul li.aim a {
background-position: -396px -44px;
}
.social-profile ul li.myspace a {
background-position: -352px -44px;
}
.social-profile ul li.flickr a {
background-position: -440px -44px;
}
.social-profile ul li.pinterest a {
background-position: -484px -44px;
}
.social-profile ul li.google-plus a {
background-position: -528px -44px;
}
.social-profile ul li.wordpress a {
background-position: -572px -44px;
}
.social-profile ul li.deviantart a {
background-position: -616px -44px;
}
.social-profile ul li.slideshare a {
background-position: -660px -44px;
}
.social-profile ul li.instagram a {
background-position: -704px -44px;
}
.social-profile ul li.skype a {
background-position: -748px -44px;
}
.social-profile ul li.soundcloud a {
background-position: -792px -44px;
}
.social-profile ul li.email a {
background-position: -837px -44px;
}
.social-profile ul li.contactus a {
background-position: -837px -44px;
}
.social-profile ul li.xing a {
background-position: -882px -44px;
}
.social-profile ul li.meetup a {
background-position: -971px -44px;
}