Border Style Test

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/holder/2.0/holder.js"></script>
<div class="panel panel-default">
    <div class="panel-body">
        <div class="media">
            <div class="media-object pull-left">
                <button class="btn btn-info option-button">A</button>
                <img src="holder.js/200x100" />
            </div>
            <div class="media-body">
                Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis 
            </div>
        </div>
    </div>
</div>

CSS

.option-button {
    height:100%;
}

.media-object {
    height: 100px;
}