.over_share {
height:100px;
margin-bottom:10px
}

.in_share {
padding-top:70px;
padding-left:16px
}

.vkontakte_share {
background:url(../images/vk_share.jpg) #2C6992;
width:200px;
height:100px;
float:left
}

.twitter_share {
background:url(../images/tw_share.jpg) #009DC4;
width:200px;
height:100px;
float:left
}

.facebook_share {
background:url(../images/fb_share.jpg) #23599D;
width:200px;
height:100px;
float:left
}
.gplus_share {
background:url(../images/gp_share.jpg) #EF341B;
width:200px;
height:100px;
float:left
}

.twitter_btn {
width:105px;
overflow:hidden;
padding:1px;
background:#FFFFFF;
margin-right:5px
}

.gplus_btn {
width:70px;
overflow:hidden;
padding:1px;
background:#FFFFFF;
margin-right:5px
}

<div class="over_share">
<div class="vkontakte_share">
<div class="in_share">
<!--vk-->
КНОПКА_VK
<!--/vk-->
</div>
</div>

<div class="twitter_share">
<div class="in_share">
<!--twitter-->
КНОПКА_TWITTER
<!--/twitter-->
</div>
</div>

<div class="facebook_share">
<div class="in_share">
<!--fb-->
КНОПКА_Facebook
<!--/fb-->
</div>
</div>

<div class="gplus_share">
<div class="in_share">
<!--gp-->
КНОПКА_GOOGLE+
<!--/gp-->

</div>
</div>
</div>

</div>