why not do this?
.outer {
background: #000000;
padding: 5px;
border: 2px solid #ffffff;
float:left;
}
.imagenigga {
border: 2px solid #ffffff;
}
<div class="outer"><img src="images.jpg" class="imagenigga"></div>
<div class="outer"><img src="images.jpg" class="imagenigga"></div>
<div class="outer"><img src="images.jpg" class="imagenigga"></div>
<div class="outer"><img src="images.jpg" class="imagenigga"></div>