Try this:
#SocialMediaBadges img{
float:left;
width:120px;
height:90px;
margin:5px;
}
Note: if you want to address an element inside an element you can do it by appending elements in the css rule.
For example #id_name div p a
will address all the links that are inside a p
element nested in div
element that also nested in element with id = id_name